// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "ui/aura/window_event_dispatcher.h"

#include <stddef.h>

#include <utility>
#include <vector>

#include "base/bind.h"
#include "base/macros.h"
#include "base/run_loop.h"
#include "base/thread_task_runner_handle.h"
#include "build/build_config.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "ui/aura/client/capture_client.h"
#include "ui/aura/client/event_client.h"
#include "ui/aura/client/focus_client.h"
#include "ui/aura/env.h"
#include "ui/aura/test/aura_test_base.h"
#include "ui/aura/test/env_test_helper.h"
#include "ui/aura/test/test_cursor_client.h"
#include "ui/aura/test/test_screen.h"
#include "ui/aura/test/test_window_delegate.h"
#include "ui/aura/test/test_windows.h"
#include "ui/aura/window.h"
#include "ui/aura/window_tracker.h"
#include "ui/base/hit_test.h"
#include "ui/events/event.h"
#include "ui/events/event_handler.h"
#include "ui/events/event_utils.h"
#include "ui/events/gesture_detection/gesture_configuration.h"
#include "ui/events/keycodes/keyboard_codes.h"
#include "ui/events/test/event_generator.h"
#include "ui/events/test/test_event_handler.h"
#include "ui/gfx/geometry/point.h"
#include "ui/gfx/geometry/rect.h"
#include "ui/gfx/screen.h"
#include "ui/gfx/transform.h"

namespace aura {
namespace {

    // A delegate that always returns a non-client component for hit tests.
    class NonClientDelegate : public test::TestWindowDelegate {
    public:
        NonClientDelegate()
            : non_client_count_(0)
            , mouse_event_count_(0)
            , mouse_event_flags_(0x0)
        {
        }
        ~NonClientDelegate() override { }

        int non_client_count() const { return non_client_count_; }
        gfx::Point non_client_location() const { return non_client_location_; }
        int mouse_event_count() const { return mouse_event_count_; }
        gfx::Point mouse_event_location() const { return mouse_event_location_; }
        int mouse_event_flags() const { return mouse_event_flags_; }

        int GetNonClientComponent(const gfx::Point& location) const override
        {
            NonClientDelegate* self = const_cast<NonClientDelegate*>(this);
            self->non_client_count_++;
            self->non_client_location_ = location;
            return HTTOPLEFT;
        }
        void OnMouseEvent(ui::MouseEvent* event) override
        {
            mouse_event_count_++;
            mouse_event_location_ = event->location();
            mouse_event_flags_ = event->flags();
            event->SetHandled();
        }

    private:
        int non_client_count_;
        gfx::Point non_client_location_;
        int mouse_event_count_;
        gfx::Point mouse_event_location_;
        int mouse_event_flags_;

        DISALLOW_COPY_AND_ASSIGN(NonClientDelegate);
    };

    // A simple event handler that consumes key events.
    class ConsumeKeyHandler : public ui::test::TestEventHandler {
    public:
        ConsumeKeyHandler() { }
        ~ConsumeKeyHandler() override { }

        // Overridden from ui::EventHandler:
        void OnKeyEvent(ui::KeyEvent* event) override
        {
            ui::test::TestEventHandler::OnKeyEvent(event);
            event->StopPropagation();
        }

    private:
        DISALLOW_COPY_AND_ASSIGN(ConsumeKeyHandler);
    };

    bool IsFocusedWindow(aura::Window* window)
    {
        return client::GetFocusClient(window)->GetFocusedWindow() == window;
    }

} // namespace

typedef test::AuraTestBase WindowEventDispatcherTest;

TEST_F(WindowEventDispatcherTest, OnHostMouseEvent)
{
    // Create two non-overlapping windows so we don't have to worry about which
    // is on top.
    scoped_ptr<NonClientDelegate> delegate1(new NonClientDelegate());
    scoped_ptr<NonClientDelegate> delegate2(new NonClientDelegate());
    const int kWindowWidth = 123;
    const int kWindowHeight = 45;
    gfx::Rect bounds1(100, 200, kWindowWidth, kWindowHeight);
    gfx::Rect bounds2(300, 400, kWindowWidth, kWindowHeight);
    scoped_ptr<aura::Window> window1(CreateTestWindowWithDelegate(
        delegate1.get(), -1234, bounds1, root_window()));
    scoped_ptr<aura::Window> window2(CreateTestWindowWithDelegate(
        delegate2.get(), -5678, bounds2, root_window()));

    // Send a mouse event to window1.
    gfx::Point point(101, 201);
    ui::MouseEvent event1(ui::ET_MOUSE_PRESSED, point, point,
        ui::EventTimeForNow(), ui::EF_LEFT_MOUSE_BUTTON,
        ui::EF_LEFT_MOUSE_BUTTON);
    DispatchEventUsingWindowDispatcher(&event1);

    // Event was tested for non-client area for the target window.
    EXPECT_EQ(1, delegate1->non_client_count());
    EXPECT_EQ(0, delegate2->non_client_count());
    // The non-client component test was in local coordinates.
    EXPECT_EQ(gfx::Point(1, 1), delegate1->non_client_location());
    // Mouse event was received by target window.
    EXPECT_EQ(1, delegate1->mouse_event_count());
    EXPECT_EQ(0, delegate2->mouse_event_count());
    // Event was in local coordinates.
    EXPECT_EQ(gfx::Point(1, 1), delegate1->mouse_event_location());
    // Non-client flag was set.
    EXPECT_TRUE(delegate1->mouse_event_flags() & ui::EF_IS_NON_CLIENT);
}

TEST_F(WindowEventDispatcherTest, RepostEvent)
{
    // Test RepostEvent in RootWindow. It only works for Mouse Press and touch
    // press.
    EXPECT_FALSE(Env::GetInstance()->IsMouseButtonDown());
    gfx::Point point(10, 10);
    ui::MouseEvent event(ui::ET_MOUSE_PRESSED, point, point,
        ui::EventTimeForNow(), ui::EF_LEFT_MOUSE_BUTTON,
        ui::EF_LEFT_MOUSE_BUTTON);
    host()->dispatcher()->RepostEvent(&event);
    RunAllPendingInMessageLoop();
    EXPECT_TRUE(Env::GetInstance()->IsMouseButtonDown());

    ui::TouchEvent touch_pressed_event(
        ui::ET_TOUCH_PRESSED, gfx::Point(10, 10), 0, ui::EventTimeForNow());
    host()->dispatcher()->RepostEvent(&touch_pressed_event);
    RunAllPendingInMessageLoop();
    EXPECT_TRUE(Env::GetInstance()->is_touch_down());
}

// Check that we correctly track the state of the mouse buttons in response to
// button press and release events.
TEST_F(WindowEventDispatcherTest, MouseButtonState)
{
    EXPECT_FALSE(Env::GetInstance()->IsMouseButtonDown());

    gfx::Point location;
    scoped_ptr<ui::MouseEvent> event;

    // Press the left button.
    event.reset(new ui::MouseEvent(
        ui::ET_MOUSE_PRESSED, location, location, ui::EventTimeForNow(),
        ui::EF_LEFT_MOUSE_BUTTON, ui::EF_LEFT_MOUSE_BUTTON));
    DispatchEventUsingWindowDispatcher(event.get());
    EXPECT_TRUE(Env::GetInstance()->IsMouseButtonDown());

    // Additionally press the right.
    event.reset(new ui::MouseEvent(
        ui::ET_MOUSE_PRESSED, location, location, ui::EventTimeForNow(),
        ui::EF_LEFT_MOUSE_BUTTON | ui::EF_RIGHT_MOUSE_BUTTON,
        ui::EF_RIGHT_MOUSE_BUTTON));
    DispatchEventUsingWindowDispatcher(event.get());
    EXPECT_TRUE(Env::GetInstance()->IsMouseButtonDown());

    // Release the left button.
    event.reset(new ui::MouseEvent(
        ui::ET_MOUSE_RELEASED, location, location, ui::EventTimeForNow(),
        ui::EF_RIGHT_MOUSE_BUTTON, ui::EF_LEFT_MOUSE_BUTTON));
    DispatchEventUsingWindowDispatcher(event.get());
    EXPECT_TRUE(Env::GetInstance()->IsMouseButtonDown());

    // Release the right button.  We should ignore the Shift-is-down flag.
    event.reset(new ui::MouseEvent(ui::ET_MOUSE_RELEASED, location, location,
        ui::EventTimeForNow(), ui::EF_SHIFT_DOWN,
        ui::EF_RIGHT_MOUSE_BUTTON));
    DispatchEventUsingWindowDispatcher(event.get());
    EXPECT_FALSE(Env::GetInstance()->IsMouseButtonDown());

    // Press the middle button.
    event.reset(new ui::MouseEvent(
        ui::ET_MOUSE_PRESSED, location, location, ui::EventTimeForNow(),
        ui::EF_MIDDLE_MOUSE_BUTTON, ui::EF_MIDDLE_MOUSE_BUTTON));
    DispatchEventUsingWindowDispatcher(event.get());
    EXPECT_TRUE(Env::GetInstance()->IsMouseButtonDown());
}

TEST_F(WindowEventDispatcherTest, TranslatedEvent)
{
    scoped_ptr<Window> w1(test::CreateTestWindowWithDelegate(NULL, 1,
        gfx::Rect(50, 50, 100, 100), root_window()));

    gfx::Point origin(100, 100);
    ui::MouseEvent root(ui::ET_MOUSE_PRESSED, origin, origin,
        ui::EventTimeForNow(), 0, 0);

    EXPECT_EQ("100,100", root.location().ToString());
    EXPECT_EQ("100,100", root.root_location().ToString());

    ui::MouseEvent translated_event(
        root, static_cast<Window*>(root_window()), w1.get(),
        ui::ET_MOUSE_ENTERED, root.flags());
    EXPECT_EQ("50,50", translated_event.location().ToString());
    EXPECT_EQ("100,100", translated_event.root_location().ToString());
}

namespace {

    class TestEventClient : public client::EventClient {
    public:
        static const int kNonLockWindowId = 100;
        static const int kLockWindowId = 200;

        explicit TestEventClient(Window* root_window)
            : root_window_(root_window)
            , lock_(false)
        {
            client::SetEventClient(root_window_, this);
            Window* lock_window = test::CreateTestWindowWithBounds(root_window_->bounds(), root_window_);
            lock_window->set_id(kLockWindowId);
            Window* non_lock_window = test::CreateTestWindowWithBounds(root_window_->bounds(), root_window_);
            non_lock_window->set_id(kNonLockWindowId);
        }
        ~TestEventClient() override { client::SetEventClient(root_window_, NULL); }

        // Starts/stops locking. Locking prevents windows other than those inside
        // the lock container from receiving events, getting focus etc.
        void Lock()
        {
            lock_ = true;
        }
        void Unlock()
        {
            lock_ = false;
        }

        Window* GetLockWindow()
        {
            return const_cast<Window*>(
                static_cast<const TestEventClient*>(this)->GetLockWindow());
        }
        const Window* GetLockWindow() const
        {
            return root_window_->GetChildById(kLockWindowId);
        }
        Window* GetNonLockWindow()
        {
            return root_window_->GetChildById(kNonLockWindowId);
        }

    private:
        // Overridden from client::EventClient:
        bool CanProcessEventsWithinSubtree(const Window* window) const override
        {
            return lock_ ? window->Contains(GetLockWindow()) || GetLockWindow()->Contains(window) : true;
        }

        ui::EventTarget* GetToplevelEventTarget() override { return NULL; }

        Window* root_window_;
        bool lock_;

        DISALLOW_COPY_AND_ASSIGN(TestEventClient);
    };

} // namespace

TEST_F(WindowEventDispatcherTest, CanProcessEventsWithinSubtree)
{
    TestEventClient client(root_window());
    test::TestWindowDelegate d;

    ui::test::TestEventHandler nonlock_ef;
    ui::test::TestEventHandler lock_ef;
    client.GetNonLockWindow()->AddPreTargetHandler(&nonlock_ef);
    client.GetLockWindow()->AddPreTargetHandler(&lock_ef);

    Window* w1 = test::CreateTestWindowWithBounds(gfx::Rect(10, 10, 20, 20),
        client.GetNonLockWindow());
    w1->set_id(1);
    Window* w2 = test::CreateTestWindowWithBounds(gfx::Rect(30, 30, 20, 20),
        client.GetNonLockWindow());
    w2->set_id(2);
    scoped_ptr<Window> w3(
        test::CreateTestWindowWithDelegate(&d, 3, gfx::Rect(30, 30, 20, 20),
            client.GetLockWindow()));

    w1->Focus();
    EXPECT_TRUE(IsFocusedWindow(w1));

    client.Lock();

    // Since we're locked, the attempt to focus w2 will be ignored.
    w2->Focus();
    EXPECT_TRUE(IsFocusedWindow(w1));
    EXPECT_FALSE(IsFocusedWindow(w2));

    {
        // Attempting to send a key event to w1 (not in the lock container) should
        // cause focus to be reset.
        ui::test::EventGenerator generator(root_window());
        generator.PressKey(ui::VKEY_SPACE, 0);
        EXPECT_EQ(NULL, client::GetFocusClient(w1)->GetFocusedWindow());
        EXPECT_FALSE(IsFocusedWindow(w1));
    }

    {
        // Events sent to a window not in the lock container will not be processed.
        // i.e. never sent to the non-lock container's event filter.
        ui::test::EventGenerator generator(root_window(), w1);
        generator.ClickLeftButton();
        EXPECT_EQ(0, nonlock_ef.num_mouse_events());

        // Events sent to a window in the lock container will be processed.
        ui::test::EventGenerator generator3(root_window(), w3.get());
        generator3.PressLeftButton();
        EXPECT_EQ(1, lock_ef.num_mouse_events());
    }

    // Prevent w3 from being deleted by the hierarchy since its delegate is owned
    // by this scope.
    w3->parent()->RemoveChild(w3.get());
}

TEST_F(WindowEventDispatcherTest, DontIgnoreUnknownKeys)
{
    ConsumeKeyHandler handler;
    root_window()->AddPreTargetHandler(&handler);

    ui::KeyEvent unknown_event(ui::ET_KEY_PRESSED, ui::VKEY_UNKNOWN, ui::EF_NONE);
    DispatchEventUsingWindowDispatcher(&unknown_event);
    EXPECT_TRUE(unknown_event.handled());
    EXPECT_EQ(1, handler.num_key_events());

    handler.Reset();
    ui::KeyEvent known_event(ui::ET_KEY_PRESSED, ui::VKEY_A, ui::EF_NONE);
    DispatchEventUsingWindowDispatcher(&known_event);
    EXPECT_TRUE(known_event.handled());
    EXPECT_EQ(1, handler.num_key_events());

    handler.Reset();
    ui::KeyEvent ime_event(ui::ET_KEY_PRESSED, ui::VKEY_UNKNOWN,
        ui::EF_IME_FABRICATED_KEY);
    DispatchEventUsingWindowDispatcher(&ime_event);
    EXPECT_TRUE(ime_event.handled());
    EXPECT_EQ(1, handler.num_key_events());

    handler.Reset();
    ui::KeyEvent unknown_key_with_char_event(ui::ET_KEY_PRESSED, ui::VKEY_UNKNOWN,
        ui::EF_NONE);
    unknown_key_with_char_event.set_character(0x00e4 /* "ä" */);
    DispatchEventUsingWindowDispatcher(&unknown_key_with_char_event);
    EXPECT_TRUE(unknown_key_with_char_event.handled());
    EXPECT_EQ(1, handler.num_key_events());
    root_window()->RemovePreTargetHandler(&handler);
}

TEST_F(WindowEventDispatcherTest, NoDelegateWindowReceivesKeyEvents)
{
    scoped_ptr<Window> w1(CreateNormalWindow(1, root_window(), NULL));
    w1->Show();
    w1->Focus();

    ui::test::TestEventHandler handler;
    w1->AddPreTargetHandler(&handler);
    ui::KeyEvent key_press(ui::ET_KEY_PRESSED, ui::VKEY_A, ui::EF_NONE);
    DispatchEventUsingWindowDispatcher(&key_press);
    EXPECT_TRUE(key_press.handled());
    EXPECT_EQ(1, handler.num_key_events());

    w1->RemovePreTargetHandler(&handler);
}

// Tests that touch-events that are beyond the bounds of the root-window do get
// propagated to the event filters correctly with the root as the target.
TEST_F(WindowEventDispatcherTest, TouchEventsOutsideBounds)
{
    ui::test::TestEventHandler handler;
    root_window()->AddPreTargetHandler(&handler);

    gfx::Point position = root_window()->bounds().origin();
    position.Offset(-10, -10);
    ui::TouchEvent press(
        ui::ET_TOUCH_PRESSED, position, 0, ui::EventTimeForNow());
    DispatchEventUsingWindowDispatcher(&press);
    EXPECT_EQ(1, handler.num_touch_events());

    position = root_window()->bounds().origin();
    position.Offset(root_window()->bounds().width() + 10,
        root_window()->bounds().height() + 10);
    ui::TouchEvent release(
        ui::ET_TOUCH_RELEASED, position, 0, ui::EventTimeForNow());
    DispatchEventUsingWindowDispatcher(&release);
    EXPECT_EQ(2, handler.num_touch_events());
    root_window()->RemovePreTargetHandler(&handler);
}

// Tests that scroll events are dispatched correctly.
TEST_F(WindowEventDispatcherTest, ScrollEventDispatch)
{
    base::TimeDelta now = ui::EventTimeForNow();
    ui::test::TestEventHandler handler;
    root_window()->AddPreTargetHandler(&handler);

    test::TestWindowDelegate delegate;
    scoped_ptr<Window> w1(CreateNormalWindow(1, root_window(), &delegate));
    w1->SetBounds(gfx::Rect(20, 20, 40, 40));

    // A scroll event on the root-window itself is dispatched.
    ui::ScrollEvent scroll1(ui::ET_SCROLL,
        gfx::Point(10, 10),
        now,
        0,
        0, -10,
        0, -10,
        2);
    DispatchEventUsingWindowDispatcher(&scroll1);
    EXPECT_EQ(1, handler.num_scroll_events());

    // Scroll event on a window should be dispatched properly.
    ui::ScrollEvent scroll2(ui::ET_SCROLL,
        gfx::Point(25, 30),
        now,
        0,
        -10, 0,
        -10, 0,
        2);
    DispatchEventUsingWindowDispatcher(&scroll2);
    EXPECT_EQ(2, handler.num_scroll_events());
    root_window()->RemovePreTargetHandler(&handler);
}

namespace {

    // FilterFilter that tracks the types of events it's seen.
    class EventFilterRecorder : public ui::EventHandler {
    public:
        typedef std::vector<ui::EventType> Events;
        typedef std::vector<gfx::Point> EventLocations;
        typedef std::vector<int> EventFlags;

        EventFilterRecorder()
            : wait_until_event_(ui::ET_UNKNOWN)
            , last_touch_may_cause_scrolling_(false)
        {
        }

        const Events& events() const { return events_; }

        const EventLocations& mouse_locations() const { return mouse_locations_; }
        gfx::Point mouse_location(int i) const { return mouse_locations_[i]; }
        const EventLocations& touch_locations() const { return touch_locations_; }
        const EventLocations& gesture_locations() const { return gesture_locations_; }
        const EventFlags& mouse_event_flags() const { return mouse_event_flags_; }

        void WaitUntilReceivedEvent(ui::EventType type)
        {
            wait_until_event_ = type;
            run_loop_.reset(new base::RunLoop());
            run_loop_->Run();
        }

        Events GetAndResetEvents()
        {
            Events events = events_;
            Reset();
            return events;
        }

        void Reset()
        {
            events_.clear();
            mouse_locations_.clear();
            touch_locations_.clear();
            gesture_locations_.clear();
            mouse_event_flags_.clear();
            last_touch_may_cause_scrolling_ = false;
        }

        // ui::EventHandler overrides:
        void OnEvent(ui::Event* event) override
        {
            ui::EventHandler::OnEvent(event);
            events_.push_back(event->type());
            if (wait_until_event_ == event->type() && run_loop_) {
                run_loop_->Quit();
                wait_until_event_ = ui::ET_UNKNOWN;
            }
        }

        void OnMouseEvent(ui::MouseEvent* event) override
        {
            mouse_locations_.push_back(event->location());
            mouse_event_flags_.push_back(event->flags());
        }

        void OnTouchEvent(ui::TouchEvent* event) override
        {
            touch_locations_.push_back(event->location());
            last_touch_may_cause_scrolling_ = event->may_cause_scrolling();
        }

        void OnGestureEvent(ui::GestureEvent* event) override
        {
            gesture_locations_.push_back(event->location());
        }

        bool HasReceivedEvent(ui::EventType type)
        {
            return std::find(events_.begin(), events_.end(), type) != events_.end();
        }

        bool LastTouchMayCauseScrolling() const
        {
            return last_touch_may_cause_scrolling_;
        }

    private:
        scoped_ptr<base::RunLoop> run_loop_;
        ui::EventType wait_until_event_;

        Events events_;
        EventLocations mouse_locations_;
        EventLocations touch_locations_;
        EventLocations gesture_locations_;
        EventFlags mouse_event_flags_;
        bool last_touch_may_cause_scrolling_;

        DISALLOW_COPY_AND_ASSIGN(EventFilterRecorder);
    };

    // Converts an EventType to a string.
    std::string EventTypeToString(ui::EventType type)
    {
        switch (type) {
        case ui::ET_TOUCH_RELEASED:
            return "TOUCH_RELEASED";

        case ui::ET_TOUCH_CANCELLED:
            return "TOUCH_CANCELLED";

        case ui::ET_TOUCH_PRESSED:
            return "TOUCH_PRESSED";

        case ui::ET_TOUCH_MOVED:
            return "TOUCH_MOVED";

        case ui::ET_MOUSE_PRESSED:
            return "MOUSE_PRESSED";

        case ui::ET_MOUSE_DRAGGED:
            return "MOUSE_DRAGGED";

        case ui::ET_MOUSE_RELEASED:
            return "MOUSE_RELEASED";

        case ui::ET_MOUSE_MOVED:
            return "MOUSE_MOVED";

        case ui::ET_MOUSE_ENTERED:
            return "MOUSE_ENTERED";

        case ui::ET_MOUSE_EXITED:
            return "MOUSE_EXITED";

        case ui::ET_GESTURE_SCROLL_BEGIN:
            return "GESTURE_SCROLL_BEGIN";

        case ui::ET_GESTURE_SCROLL_END:
            return "GESTURE_SCROLL_END";

        case ui::ET_GESTURE_SCROLL_UPDATE:
            return "GESTURE_SCROLL_UPDATE";

        case ui::ET_GESTURE_PINCH_BEGIN:
            return "GESTURE_PINCH_BEGIN";

        case ui::ET_GESTURE_PINCH_END:
            return "GESTURE_PINCH_END";

        case ui::ET_GESTURE_PINCH_UPDATE:
            return "GESTURE_PINCH_UPDATE";

        case ui::ET_GESTURE_TAP:
            return "GESTURE_TAP";

        case ui::ET_GESTURE_TAP_DOWN:
            return "GESTURE_TAP_DOWN";

        case ui::ET_GESTURE_TAP_CANCEL:
            return "GESTURE_TAP_CANCEL";

        case ui::ET_GESTURE_SHOW_PRESS:
            return "GESTURE_SHOW_PRESS";

        case ui::ET_GESTURE_BEGIN:
            return "GESTURE_BEGIN";

        case ui::ET_GESTURE_END:
            return "GESTURE_END";

        default:
            // We should explicitly require each event type.
            NOTREACHED() << "Received unexpected event: " << type;
            break;
        }
        return "";
    }

    std::string EventTypesToString(const EventFilterRecorder::Events& events)
    {
        std::string result;
        for (size_t i = 0; i < events.size(); ++i) {
            if (i != 0)
                result += " ";
            result += EventTypeToString(events[i]);
        }
        return result;
    }

} // namespace

#if defined(OS_WIN) && defined(ARCH_CPU_X86)
#define MAYBE(x) DISABLED_##x
#else
#define MAYBE(x) x
#endif

// Verifies a repost mouse event targets the window with capture (if there is
// one).
// Flaky on 32-bit Windows bots.  http://crbug.com/388290
TEST_F(WindowEventDispatcherTest, MAYBE(RepostTargetsCaptureWindow))
{
    // Set capture on |window| generate a mouse event (that is reposted) and not
    // over |window| and verify |window| gets it (|window| gets it because it has
    // capture).
    EXPECT_FALSE(Env::GetInstance()->IsMouseButtonDown());
    EventFilterRecorder recorder;
    scoped_ptr<Window> window(CreateNormalWindow(1, root_window(), NULL));
    window->SetBounds(gfx::Rect(20, 20, 40, 30));
    window->AddPreTargetHandler(&recorder);
    window->SetCapture();
    const ui::MouseEvent press_event(
        ui::ET_MOUSE_PRESSED, gfx::Point(), gfx::Point(), ui::EventTimeForNow(),
        ui::EF_LEFT_MOUSE_BUTTON, ui::EF_LEFT_MOUSE_BUTTON);
    host()->dispatcher()->RepostEvent(&press_event);
    RunAllPendingInMessageLoop(); // Necessitated by RepostEvent().
    // Mouse moves/enters may be generated. We only care about a pressed.
    EXPECT_TRUE(EventTypesToString(recorder.events()).find("MOUSE_PRESSED") != std::string::npos) << EventTypesToString(recorder.events());
}

TEST_F(WindowEventDispatcherTest, MouseMovesHeld)
{
    EventFilterRecorder recorder;
    root_window()->AddPreTargetHandler(&recorder);

    test::TestWindowDelegate delegate;
    scoped_ptr<aura::Window> window(CreateTestWindowWithDelegate(
        &delegate, 1, gfx::Rect(0, 0, 100, 100), root_window()));

    ui::MouseEvent mouse_move_event(ui::ET_MOUSE_MOVED, gfx::Point(0, 0),
        gfx::Point(0, 0), ui::EventTimeForNow(), 0,
        0);
    DispatchEventUsingWindowDispatcher(&mouse_move_event);
    // Discard MOUSE_ENTER.
    recorder.Reset();

    host()->dispatcher()->HoldPointerMoves();

    // Check that we don't immediately dispatch the MOUSE_DRAGGED event.
    ui::MouseEvent mouse_dragged_event(ui::ET_MOUSE_DRAGGED, gfx::Point(0, 0),
        gfx::Point(0, 0), ui::EventTimeForNow(), 0,
        0);
    DispatchEventUsingWindowDispatcher(&mouse_dragged_event);
    EXPECT_TRUE(recorder.events().empty());

    // Check that we do dispatch the held MOUSE_DRAGGED event before another type
    // of event.
    ui::MouseEvent mouse_pressed_event(ui::ET_MOUSE_PRESSED, gfx::Point(0, 0),
        gfx::Point(0, 0), ui::EventTimeForNow(), 0,
        0);
    DispatchEventUsingWindowDispatcher(&mouse_pressed_event);
    EXPECT_EQ("MOUSE_DRAGGED MOUSE_PRESSED",
        EventTypesToString(recorder.events()));
    recorder.Reset();

    // Check that we coalesce held MOUSE_DRAGGED events. Note that here (and
    // elsewhere in this test) we re-define each event prior to dispatch so that
    // it has the correct state (phase, handled, target, etc.).
    mouse_dragged_event = ui::MouseEvent(ui::ET_MOUSE_DRAGGED, gfx::Point(0, 0), gfx::Point(0, 0),
        ui::EventTimeForNow(), 0, 0);
    ui::MouseEvent mouse_dragged_event2(ui::ET_MOUSE_DRAGGED, gfx::Point(10, 10),
        gfx::Point(10, 10), ui::EventTimeForNow(),
        0, 0);
    DispatchEventUsingWindowDispatcher(&mouse_dragged_event);
    DispatchEventUsingWindowDispatcher(&mouse_dragged_event2);
    EXPECT_TRUE(recorder.events().empty());
    mouse_pressed_event = ui::MouseEvent(ui::ET_MOUSE_PRESSED, gfx::Point(0, 0), gfx::Point(0, 0),
        ui::EventTimeForNow(), 0, 0);
    DispatchEventUsingWindowDispatcher(&mouse_pressed_event);
    EXPECT_EQ("MOUSE_DRAGGED MOUSE_PRESSED",
        EventTypesToString(recorder.events()));
    recorder.Reset();

    // Check that on ReleasePointerMoves, held events are not dispatched
    // immediately, but posted instead.
    mouse_dragged_event = ui::MouseEvent(ui::ET_MOUSE_DRAGGED, gfx::Point(0, 0), gfx::Point(0, 0),
        ui::EventTimeForNow(), 0, 0);
    DispatchEventUsingWindowDispatcher(&mouse_dragged_event);
    host()->dispatcher()->ReleasePointerMoves();
    EXPECT_TRUE(recorder.events().empty());
    RunAllPendingInMessageLoop();
    EXPECT_EQ("MOUSE_DRAGGED", EventTypesToString(recorder.events()));
    recorder.Reset();

    // However if another message comes in before the dispatch of the posted
    // event, check that the posted event is dispatched before this new event.
    host()->dispatcher()->HoldPointerMoves();
    mouse_dragged_event = ui::MouseEvent(ui::ET_MOUSE_DRAGGED, gfx::Point(0, 0), gfx::Point(0, 0),
        ui::EventTimeForNow(), 0, 0);
    DispatchEventUsingWindowDispatcher(&mouse_dragged_event);
    host()->dispatcher()->ReleasePointerMoves();
    mouse_pressed_event = ui::MouseEvent(ui::ET_MOUSE_PRESSED, gfx::Point(0, 0), gfx::Point(0, 0),
        ui::EventTimeForNow(), 0, 0);
    DispatchEventUsingWindowDispatcher(&mouse_pressed_event);
    EXPECT_EQ("MOUSE_DRAGGED MOUSE_PRESSED",
        EventTypesToString(recorder.events()));
    recorder.Reset();
    RunAllPendingInMessageLoop();
    EXPECT_TRUE(recorder.events().empty());

    // Check that if the other message is another MOUSE_DRAGGED, we still coalesce
    // them.
    host()->dispatcher()->HoldPointerMoves();
    mouse_dragged_event = ui::MouseEvent(ui::ET_MOUSE_DRAGGED, gfx::Point(0, 0), gfx::Point(0, 0),
        ui::EventTimeForNow(), 0, 0);
    DispatchEventUsingWindowDispatcher(&mouse_dragged_event);
    host()->dispatcher()->ReleasePointerMoves();
    mouse_dragged_event2 = ui::MouseEvent(ui::ET_MOUSE_DRAGGED, gfx::Point(10, 10),
        gfx::Point(10, 10), ui::EventTimeForNow(), 0, 0);
    DispatchEventUsingWindowDispatcher(&mouse_dragged_event2);
    EXPECT_EQ("MOUSE_DRAGGED", EventTypesToString(recorder.events()));
    recorder.Reset();
    RunAllPendingInMessageLoop();
    EXPECT_TRUE(recorder.events().empty());

    // Check that synthetic mouse move event has a right location when issued
    // while holding pointer moves.
    mouse_dragged_event = ui::MouseEvent(ui::ET_MOUSE_DRAGGED, gfx::Point(0, 0), gfx::Point(0, 0),
        ui::EventTimeForNow(), 0, 0);
    mouse_dragged_event2 = ui::MouseEvent(ui::ET_MOUSE_DRAGGED, gfx::Point(10, 10),
        gfx::Point(10, 10), ui::EventTimeForNow(), 0, 0);
    ui::MouseEvent mouse_dragged_event3(ui::ET_MOUSE_DRAGGED, gfx::Point(28, 28),
        gfx::Point(28, 28), ui::EventTimeForNow(),
        0, 0);
    host()->dispatcher()->HoldPointerMoves();
    DispatchEventUsingWindowDispatcher(&mouse_dragged_event);
    DispatchEventUsingWindowDispatcher(&mouse_dragged_event2);
    window->SetBounds(gfx::Rect(15, 15, 80, 80));
    DispatchEventUsingWindowDispatcher(&mouse_dragged_event3);
    RunAllPendingInMessageLoop();
    EXPECT_TRUE(recorder.events().empty());
    host()->dispatcher()->ReleasePointerMoves();
    RunAllPendingInMessageLoop();
    EXPECT_EQ("MOUSE_MOVED", EventTypesToString(recorder.events()));
    EXPECT_EQ(gfx::Point(13, 13), recorder.mouse_location(0));
    recorder.Reset();
    root_window()->RemovePreTargetHandler(&recorder);
}

TEST_F(WindowEventDispatcherTest, TouchMovesHeld)
{
    EventFilterRecorder recorder;
    root_window()->AddPreTargetHandler(&recorder);

    test::TestWindowDelegate delegate;
    scoped_ptr<aura::Window> window(CreateTestWindowWithDelegate(
        &delegate, 1, gfx::Rect(50, 50, 100, 100), root_window()));

    // Starting the touch and throwing out the first few events, since the system
    // is going to generate synthetic mouse events that are not relevant to the
    // test.
    ui::TouchEvent touch_pressed_event(
        ui::ET_TOUCH_PRESSED, gfx::Point(10, 10), 0, ui::EventTimeForNow());
    DispatchEventUsingWindowDispatcher(&touch_pressed_event);
    recorder.WaitUntilReceivedEvent(ui::ET_GESTURE_SHOW_PRESS);
    recorder.Reset();

    host()->dispatcher()->HoldPointerMoves();

    // Check that we don't immediately dispatch the TOUCH_MOVED event.
    ui::TouchEvent touch_moved_event(
        ui::ET_TOUCH_MOVED, gfx::Point(10, 10), 0, ui::EventTimeForNow());
    ui::TouchEvent touch_moved_event2(
        ui::ET_TOUCH_MOVED, gfx::Point(11, 10), 0, ui::EventTimeForNow());
    ui::TouchEvent touch_moved_event3(
        ui::ET_TOUCH_MOVED, gfx::Point(12, 10), 0, ui::EventTimeForNow());

    DispatchEventUsingWindowDispatcher(&touch_moved_event);
    EXPECT_TRUE(recorder.events().empty());

    // Check that on ReleasePointerMoves, held events are not dispatched
    // immediately, but posted instead.
    DispatchEventUsingWindowDispatcher(&touch_moved_event2);
    host()->dispatcher()->ReleasePointerMoves();
    EXPECT_TRUE(recorder.events().empty());

    RunAllPendingInMessageLoop();
    EXPECT_EQ("TOUCH_MOVED", EventTypesToString(recorder.events()));
    recorder.Reset();

    // If another touch event occurs then the held touch should be dispatched
    // immediately before it.
    ui::TouchEvent touch_released_event(
        ui::ET_TOUCH_RELEASED, gfx::Point(10, 10), 0, ui::EventTimeForNow());
    recorder.Reset();
    host()->dispatcher()->HoldPointerMoves();
    DispatchEventUsingWindowDispatcher(&touch_moved_event3);
    DispatchEventUsingWindowDispatcher(&touch_released_event);
    EXPECT_EQ("TOUCH_MOVED TOUCH_RELEASED GESTURE_TAP GESTURE_END",
        EventTypesToString(recorder.events()));
    recorder.Reset();
    host()->dispatcher()->ReleasePointerMoves();
    RunAllPendingInMessageLoop();
    EXPECT_TRUE(recorder.events().empty());
    root_window()->RemovePreTargetHandler(&recorder);
}

// Tests that mouse move event has a right location
// when there isn't the target window
TEST_F(WindowEventDispatcherTest, MouseEventWithoutTargetWindow)
{
    EventFilterRecorder recorder_first;
    EventFilterRecorder recorder_second;

    test::TestWindowDelegate delegate;
    scoped_ptr<aura::Window> window_first(CreateTestWindowWithDelegate(
        &delegate, 1, gfx::Rect(20, 10, 10, 20), root_window()));
    window_first->Show();
    window_first->AddPreTargetHandler(&recorder_first);

    scoped_ptr<aura::Window> window_second(CreateTestWindowWithDelegate(
        &delegate, 2, gfx::Rect(20, 30, 10, 20), root_window()));
    window_second->Show();
    window_second->AddPreTargetHandler(&recorder_second);

    const gfx::Point event_location(22, 33);
    ui::MouseEvent mouse(ui::ET_MOUSE_MOVED, event_location, event_location,
        ui::EventTimeForNow(), 0, 0);
    DispatchEventUsingWindowDispatcher(&mouse);

    EXPECT_TRUE(recorder_first.events().empty());
    EXPECT_EQ("MOUSE_ENTERED MOUSE_MOVED",
        EventTypesToString(recorder_second.events()));
    ASSERT_EQ(2u, recorder_second.mouse_locations().size());
    EXPECT_EQ(gfx::Point(2, 3).ToString(),
        recorder_second.mouse_locations()[0].ToString());
}

// Tests that a mouse exit is dispatched to the last mouse location when
// the window is hiddden.
TEST_F(WindowEventDispatcherTest, DispatchMouseExitWhenHidingWindow)
{
    EventFilterRecorder recorder;

    test::TestWindowDelegate delegate;
    scoped_ptr<aura::Window> window(CreateTestWindowWithDelegate(
        &delegate, 1, gfx::Rect(10, 10, 50, 50), root_window()));
    window->Show();
    window->AddPreTargetHandler(&recorder);

    // Dispatch a mouse move event into the window.
    const gfx::Point event_location(22, 33);
    ui::MouseEvent mouse(ui::ET_MOUSE_MOVED, event_location, event_location,
        ui::EventTimeForNow(), 0, 0);
    DispatchEventUsingWindowDispatcher(&mouse);
    EXPECT_FALSE(recorder.events().empty());
    recorder.Reset();

    // Hide the window and verify a mouse exit event's location.
    window->Hide();
    EXPECT_FALSE(recorder.events().empty());
    EXPECT_EQ("MOUSE_EXITED", EventTypesToString(recorder.events()));
    ASSERT_EQ(1u, recorder.mouse_locations().size());
    EXPECT_EQ(gfx::Point(12, 23).ToString(),
        recorder.mouse_locations()[0].ToString());
}

// Verifies that a direct call to ProcessedTouchEvent() does not cause a crash.
TEST_F(WindowEventDispatcherTest, CallToProcessedTouchEvent)
{
    test::TestWindowDelegate delegate;
    scoped_ptr<aura::Window> window(CreateTestWindowWithDelegate(
        &delegate, 1, gfx::Rect(50, 50, 100, 100), root_window()));

    host()->dispatcher()->ProcessedTouchEvent(0, window.get(), ui::ER_UNHANDLED);
}

// This event handler requests the dispatcher to start holding pointer-move
// events when it receives the first scroll-update gesture.
class HoldPointerOnScrollHandler : public ui::test::TestEventHandler {
public:
    HoldPointerOnScrollHandler(WindowEventDispatcher* dispatcher,
        EventFilterRecorder* filter)
        : dispatcher_(dispatcher)
        , filter_(filter)
        , holding_moves_(false)
    {
    }
    ~HoldPointerOnScrollHandler() override { }

private:
    // ui::test::TestEventHandler:
    void OnGestureEvent(ui::GestureEvent* gesture) override
    {
        if (!holding_moves_ && gesture->type() == ui::ET_GESTURE_SCROLL_UPDATE) {
            holding_moves_ = true;
            dispatcher_->HoldPointerMoves();
            filter_->Reset();
        } else if (gesture->type() == ui::ET_GESTURE_SCROLL_END) {
            dispatcher_->ReleasePointerMoves();
            holding_moves_ = false;
        }
    }

    WindowEventDispatcher* dispatcher_;
    EventFilterRecorder* filter_;
    bool holding_moves_;

    DISALLOW_COPY_AND_ASSIGN(HoldPointerOnScrollHandler);
};

// Tests that touch-move events don't contribute to an in-progress scroll
// gesture if touch-move events are being held by the dispatcher.
TEST_F(WindowEventDispatcherTest, TouchMovesHeldOnScroll)
{
    EventFilterRecorder recorder;
    root_window()->AddPreTargetHandler(&recorder);
    test::TestWindowDelegate delegate;
    HoldPointerOnScrollHandler handler(host()->dispatcher(), &recorder);
    scoped_ptr<aura::Window> window(CreateTestWindowWithDelegate(
        &delegate, 1, gfx::Rect(50, 50, 100, 100), root_window()));
    window->AddPreTargetHandler(&handler);

    ui::test::EventGenerator generator(root_window());
    generator.GestureScrollSequence(
        gfx::Point(60, 60), gfx::Point(10, 60),
        base::TimeDelta::FromMilliseconds(100), 25);

    // |handler| will have reset |filter| and started holding the touch-move
    // events when scrolling started. At the end of the scroll (i.e. upon
    // touch-release), the held touch-move event will have been dispatched first,
    // along with the subsequent events (i.e. touch-release, scroll-end, and
    // gesture-end).
    const EventFilterRecorder::Events& events = recorder.events();
    EXPECT_EQ(
        "TOUCH_MOVED GESTURE_SCROLL_UPDATE TOUCH_RELEASED "
        "GESTURE_SCROLL_END GESTURE_END",
        EventTypesToString(events));
    ASSERT_EQ(2u, recorder.touch_locations().size());
    EXPECT_EQ(gfx::Point(-40, 10).ToString(),
        recorder.touch_locations()[0].ToString());
    EXPECT_EQ(gfx::Point(-40, 10).ToString(),
        recorder.touch_locations()[1].ToString());
    root_window()->RemovePreTargetHandler(&recorder);
}

// Tests that a 'held' touch-event does contribute to gesture event when it is
// dispatched.
TEST_F(WindowEventDispatcherTest, HeldTouchMoveContributesToGesture)
{
    EventFilterRecorder recorder;
    root_window()->AddPreTargetHandler(&recorder);

    const gfx::Point location(20, 20);
    ui::TouchEvent press(
        ui::ET_TOUCH_PRESSED, location, 0, ui::EventTimeForNow());
    DispatchEventUsingWindowDispatcher(&press);
    EXPECT_TRUE(recorder.HasReceivedEvent(ui::ET_TOUCH_PRESSED));
    recorder.Reset();

    host()->dispatcher()->HoldPointerMoves();

    ui::TouchEvent move(ui::ET_TOUCH_MOVED,
        location + gfx::Vector2d(100, 100),
        0,
        ui::EventTimeForNow());
    DispatchEventUsingWindowDispatcher(&move);
    EXPECT_FALSE(recorder.HasReceivedEvent(ui::ET_TOUCH_MOVED));
    EXPECT_FALSE(recorder.HasReceivedEvent(ui::ET_GESTURE_SCROLL_BEGIN));
    recorder.Reset();

    host()->dispatcher()->ReleasePointerMoves();
    EXPECT_FALSE(recorder.HasReceivedEvent(ui::ET_TOUCH_MOVED));
    RunAllPendingInMessageLoop();
    EXPECT_TRUE(recorder.HasReceivedEvent(ui::ET_TOUCH_MOVED));
    EXPECT_TRUE(recorder.HasReceivedEvent(ui::ET_GESTURE_SCROLL_BEGIN));
    EXPECT_TRUE(recorder.HasReceivedEvent(ui::ET_GESTURE_SCROLL_UPDATE));

    root_window()->RemovePreTargetHandler(&recorder);
}

// Tests that synthetic mouse events are ignored when mouse
// events are disabled.
TEST_F(WindowEventDispatcherTest, DispatchSyntheticMouseEvents)
{
    EventFilterRecorder recorder;
    root_window()->AddPreTargetHandler(&recorder);

    test::TestWindowDelegate delegate;
    scoped_ptr<aura::Window> window(CreateTestWindowWithDelegate(
        &delegate, 1234, gfx::Rect(5, 5, 100, 100), root_window()));
    window->Show();
    window->SetCapture();

    test::TestCursorClient cursor_client(root_window());

    // Dispatch a non-synthetic mouse event when mouse events are enabled.
    ui::MouseEvent mouse1(ui::ET_MOUSE_MOVED, gfx::Point(10, 10),
        gfx::Point(10, 10), ui::EventTimeForNow(), 0, 0);
    DispatchEventUsingWindowDispatcher(&mouse1);
    EXPECT_FALSE(recorder.events().empty());
    recorder.Reset();

    // Dispatch a synthetic mouse event when mouse events are enabled.
    ui::MouseEvent mouse2(ui::ET_MOUSE_MOVED, gfx::Point(10, 10),
        gfx::Point(10, 10), ui::EventTimeForNow(),
        ui::EF_IS_SYNTHESIZED, 0);
    DispatchEventUsingWindowDispatcher(&mouse2);
    EXPECT_FALSE(recorder.events().empty());
    recorder.Reset();

    // Dispatch a synthetic mouse event when mouse events are disabled.
    cursor_client.DisableMouseEvents();
    DispatchEventUsingWindowDispatcher(&mouse2);
    EXPECT_TRUE(recorder.events().empty());
    root_window()->RemovePreTargetHandler(&recorder);
}

// Tests that a mouse-move event is not synthesized when a mouse-button is down.
TEST_F(WindowEventDispatcherTest, DoNotSynthesizeWhileButtonDown)
{
    EventFilterRecorder recorder;
    test::TestWindowDelegate delegate;
    scoped_ptr<aura::Window> window(CreateTestWindowWithDelegate(
        &delegate, 1234, gfx::Rect(5, 5, 100, 100), root_window()));
    window->Show();

    window->AddPreTargetHandler(&recorder);
    // Dispatch a non-synthetic mouse event when mouse events are enabled.
    ui::MouseEvent mouse1(ui::ET_MOUSE_PRESSED, gfx::Point(10, 10),
        gfx::Point(10, 10), ui::EventTimeForNow(),
        ui::EF_LEFT_MOUSE_BUTTON, ui::EF_LEFT_MOUSE_BUTTON);
    DispatchEventUsingWindowDispatcher(&mouse1);
    ASSERT_EQ(1u, recorder.events().size());
    EXPECT_EQ(ui::ET_MOUSE_PRESSED, recorder.events()[0]);
    window->RemovePreTargetHandler(&recorder);
    recorder.Reset();

    // Move |window| away from underneath the cursor.
    root_window()->AddPreTargetHandler(&recorder);
    window->SetBounds(gfx::Rect(30, 30, 100, 100));
    EXPECT_TRUE(recorder.events().empty());
    RunAllPendingInMessageLoop();
    EXPECT_TRUE(recorder.events().empty());
    root_window()->RemovePreTargetHandler(&recorder);
}

#if defined(OS_WIN) && defined(ARCH_CPU_X86)
#define MAYBE(x) DISABLED_##x
#else
#define MAYBE(x) x
#endif

// Tests synthetic mouse events generated when window bounds changes such that
// the cursor previously outside the window becomes inside, or vice versa.
// Do not synthesize events if the window ignores events or is invisible.
// Flaky on 32-bit Windows bots.  http://crbug.com/388272
TEST_F(WindowEventDispatcherTest,
    MAYBE(SynthesizeMouseEventsOnWindowBoundsChanged))
{
    test::TestWindowDelegate delegate;
    scoped_ptr<aura::Window> window(CreateTestWindowWithDelegate(
        &delegate, 1234, gfx::Rect(5, 5, 100, 100), root_window()));
    window->Show();
    window->SetCapture();

    EventFilterRecorder recorder;
    window->AddPreTargetHandler(&recorder);

    // Dispatch a non-synthetic mouse event to place cursor inside window bounds.
    ui::MouseEvent mouse(ui::ET_MOUSE_MOVED, gfx::Point(10, 10),
        gfx::Point(10, 10), ui::EventTimeForNow(), 0, 0);
    DispatchEventUsingWindowDispatcher(&mouse);
    EXPECT_FALSE(recorder.events().empty());
    recorder.Reset();

    // Update the window bounds so that cursor is now outside the window.
    // This should trigger a synthetic MOVED event.
    gfx::Rect bounds1(20, 20, 100, 100);
    window->SetBounds(bounds1);
    RunAllPendingInMessageLoop();
    ASSERT_FALSE(recorder.events().empty());
    ASSERT_FALSE(recorder.mouse_event_flags().empty());
    EXPECT_EQ(ui::ET_MOUSE_MOVED, recorder.events().back());
    EXPECT_EQ(ui::EF_IS_SYNTHESIZED, recorder.mouse_event_flags().back());
    recorder.Reset();

    // Set window to ignore events.
    window->set_ignore_events(true);

    // Update the window bounds so that cursor is back inside the window.
    // This should not trigger a synthetic event.
    gfx::Rect bounds2(5, 5, 100, 100);
    window->SetBounds(bounds2);
    RunAllPendingInMessageLoop();
    EXPECT_TRUE(recorder.events().empty());
    recorder.Reset();

    // Set window to accept events but invisible.
    window->set_ignore_events(false);
    window->Hide();
    recorder.Reset();

    // Update the window bounds so that cursor is outside the window.
    // This should not trigger a synthetic event.
    window->SetBounds(bounds1);
    RunAllPendingInMessageLoop();
    EXPECT_TRUE(recorder.events().empty());
}

// Tests that a mouse exit is dispatched to the last known cursor location
// when the cursor becomes invisible.
TEST_F(WindowEventDispatcherTest, DispatchMouseExitWhenCursorHidden)
{
    EventFilterRecorder recorder;
    root_window()->AddPreTargetHandler(&recorder);

    test::TestWindowDelegate delegate;
    gfx::Point window_origin(7, 18);
    scoped_ptr<aura::Window> window(CreateTestWindowWithDelegate(
        &delegate, 1234, gfx::Rect(window_origin, gfx::Size(100, 100)),
        root_window()));
    window->Show();

    // Dispatch a mouse move event into the window.
    gfx::Point mouse_location(gfx::Point(15, 25));
    ui::MouseEvent mouse1(ui::ET_MOUSE_MOVED, mouse_location, mouse_location,
        ui::EventTimeForNow(), 0, 0);
    EXPECT_TRUE(recorder.events().empty());
    DispatchEventUsingWindowDispatcher(&mouse1);
    EXPECT_FALSE(recorder.events().empty());
    recorder.Reset();

    // Hide the cursor and verify a mouse exit was dispatched.
    host()->OnCursorVisibilityChanged(false);
    EXPECT_FALSE(recorder.events().empty());
    EXPECT_EQ("MOUSE_EXITED", EventTypesToString(recorder.events()));

    // Verify the mouse exit was dispatched at the correct location
    // (in the correct coordinate space).
    int translated_x = mouse_location.x() - window_origin.x();
    int translated_y = mouse_location.y() - window_origin.y();
    gfx::Point translated_point(translated_x, translated_y);
    EXPECT_EQ(recorder.mouse_location(0).ToString(), translated_point.ToString());
    root_window()->RemovePreTargetHandler(&recorder);
}

// Tests that a synthetic mouse exit is dispatched to the last known cursor
// location after mouse events are disabled on the cursor client.
TEST_F(WindowEventDispatcherTest,
    DispatchSyntheticMouseExitAfterMouseEventsDisabled)
{
    EventFilterRecorder recorder;
    root_window()->AddPreTargetHandler(&recorder);

    test::TestWindowDelegate delegate;
    gfx::Point window_origin(7, 18);
    scoped_ptr<aura::Window> window(CreateTestWindowWithDelegate(
        &delegate, 1234, gfx::Rect(window_origin, gfx::Size(100, 100)),
        root_window()));
    window->Show();

    // Dispatch a mouse move event into the window.
    gfx::Point mouse_location(gfx::Point(15, 25));
    ui::MouseEvent mouse1(ui::ET_MOUSE_MOVED, mouse_location, mouse_location,
        ui::EventTimeForNow(), 0, 0);
    EXPECT_TRUE(recorder.events().empty());
    DispatchEventUsingWindowDispatcher(&mouse1);
    EXPECT_FALSE(recorder.events().empty());
    recorder.Reset();

    test::TestCursorClient cursor_client(root_window());
    cursor_client.DisableMouseEvents();

    gfx::Point mouse_exit_location(gfx::Point(150, 150));
    ui::MouseEvent mouse2(ui::ET_MOUSE_EXITED, gfx::Point(150, 150),
        gfx::Point(150, 150), ui::EventTimeForNow(),
        ui::EF_IS_SYNTHESIZED, 0);
    DispatchEventUsingWindowDispatcher(&mouse2);

    EXPECT_FALSE(recorder.events().empty());
    // We get the mouse exited event twice in our filter. Once during the
    // predispatch phase and during the actual dispatch.
    EXPECT_EQ("MOUSE_EXITED MOUSE_EXITED", EventTypesToString(recorder.events()));

    // Verify the mouse exit was dispatched at the correct location
    // (in the correct coordinate space).
    int translated_x = mouse_exit_location.x() - window_origin.x();
    int translated_y = mouse_exit_location.y() - window_origin.y();
    gfx::Point translated_point(translated_x, translated_y);
    EXPECT_EQ(recorder.mouse_location(0).ToString(), translated_point.ToString());
    root_window()->RemovePreTargetHandler(&recorder);
}

class DeletingEventFilter : public ui::EventHandler {
public:
    DeletingEventFilter()
        : delete_during_pre_handle_(false)
    {
    }
    ~DeletingEventFilter() override { }

    void Reset(bool delete_during_pre_handle)
    {
        delete_during_pre_handle_ = delete_during_pre_handle;
    }

private:
    // Overridden from ui::EventHandler:
    void OnKeyEvent(ui::KeyEvent* event) override
    {
        if (delete_during_pre_handle_)
            delete event->target();
    }

    void OnMouseEvent(ui::MouseEvent* event) override
    {
        if (delete_during_pre_handle_)
            delete event->target();
    }

    bool delete_during_pre_handle_;

    DISALLOW_COPY_AND_ASSIGN(DeletingEventFilter);
};

class DeletingWindowDelegate : public test::TestWindowDelegate {
public:
    DeletingWindowDelegate()
        : window_(NULL)
        , delete_during_handle_(false)
        , got_event_(false)
    {
    }
    ~DeletingWindowDelegate() override { }

    void Reset(Window* window, bool delete_during_handle)
    {
        window_ = window;
        delete_during_handle_ = delete_during_handle;
        got_event_ = false;
    }
    bool got_event() const { return got_event_; }

private:
    // Overridden from WindowDelegate:
    void OnKeyEvent(ui::KeyEvent* event) override
    {
        if (delete_during_handle_)
            delete window_;
        got_event_ = true;
    }

    void OnMouseEvent(ui::MouseEvent* event) override
    {
        if (delete_during_handle_)
            delete window_;
        got_event_ = true;
    }

    Window* window_;
    bool delete_during_handle_;
    bool got_event_;

    DISALLOW_COPY_AND_ASSIGN(DeletingWindowDelegate);
};

TEST_F(WindowEventDispatcherTest, DeleteWindowDuringDispatch)
{
    // Verifies that we can delete a window during each phase of event handling.
    // Deleting the window should not cause a crash, only prevent further
    // processing from occurring.
    scoped_ptr<Window> w1(CreateNormalWindow(1, root_window(), NULL));
    DeletingWindowDelegate d11;
    Window* w11 = CreateNormalWindow(11, w1.get(), &d11);
    WindowTracker tracker;
    DeletingEventFilter w1_filter;
    w1->AddPreTargetHandler(&w1_filter);
    client::GetFocusClient(w1.get())->FocusWindow(w11);

    ui::test::EventGenerator generator(root_window(), w11);

    // First up, no one deletes anything.
    tracker.Add(w11);
    d11.Reset(w11, false);

    generator.PressLeftButton();
    EXPECT_TRUE(tracker.Contains(w11));
    EXPECT_TRUE(d11.got_event());
    generator.ReleaseLeftButton();

    // Delegate deletes w11. This will prevent the post-handle step from applying.
    w1_filter.Reset(false);
    d11.Reset(w11, true);
    generator.PressKey(ui::VKEY_A, 0);
    EXPECT_FALSE(tracker.Contains(w11));
    EXPECT_TRUE(d11.got_event());

    // Pre-handle step deletes w11. This will prevent the delegate and the post-
    // handle steps from applying.
    w11 = CreateNormalWindow(11, w1.get(), &d11);
    w1_filter.Reset(true);
    d11.Reset(w11, false);
    generator.PressLeftButton();
    EXPECT_FALSE(tracker.Contains(w11));
    EXPECT_FALSE(d11.got_event());
}

namespace {

    // A window delegate that detaches the parent of the target's parent window when
    // it receives a tap event.
    class DetachesParentOnTapDelegate : public test::TestWindowDelegate {
    public:
        DetachesParentOnTapDelegate() { }
        ~DetachesParentOnTapDelegate() override { }

    private:
        void OnGestureEvent(ui::GestureEvent* event) override
        {
            if (event->type() == ui::ET_GESTURE_TAP_DOWN) {
                event->SetHandled();
                return;
            }

            if (event->type() == ui::ET_GESTURE_TAP) {
                Window* parent = static_cast<Window*>(event->target())->parent();
                parent->parent()->RemoveChild(parent);
                event->SetHandled();
            }
        }

        DISALLOW_COPY_AND_ASSIGN(DetachesParentOnTapDelegate);
    };

} // namespace

// Tests that the gesture recognizer is reset for all child windows when a
// window hides. No expectations, just checks that the test does not crash.
TEST_F(WindowEventDispatcherTest,
    GestureRecognizerResetsTargetWhenParentHides)
{
    scoped_ptr<Window> w1(CreateNormalWindow(1, root_window(), NULL));
    DetachesParentOnTapDelegate delegate;
    scoped_ptr<Window> parent(CreateNormalWindow(22, w1.get(), NULL));
    Window* child = CreateNormalWindow(11, parent.get(), &delegate);
    ui::test::EventGenerator generator(root_window(), child);
    generator.GestureTapAt(gfx::Point(40, 40));
}

namespace {

    // A window delegate that processes nested gestures on tap.
    class NestedGestureDelegate : public test::TestWindowDelegate {
    public:
        NestedGestureDelegate(ui::test::EventGenerator* generator,
            const gfx::Point tap_location)
            : generator_(generator)
            , tap_location_(tap_location)
            , gesture_end_count_(0)
        {
        }
        ~NestedGestureDelegate() override { }

        int gesture_end_count() const { return gesture_end_count_; }

    private:
        void OnGestureEvent(ui::GestureEvent* event) override
        {
            switch (event->type()) {
            case ui::ET_GESTURE_TAP_DOWN:
                event->SetHandled();
                break;
            case ui::ET_GESTURE_TAP:
                if (generator_)
                    generator_->GestureTapAt(tap_location_);
                event->SetHandled();
                break;
            case ui::ET_GESTURE_END:
                ++gesture_end_count_;
                break;
            default:
                break;
            }
        }

        ui::test::EventGenerator* generator_;
        const gfx::Point tap_location_;
        int gesture_end_count_;
        DISALLOW_COPY_AND_ASSIGN(NestedGestureDelegate);
    };

} // namespace

// Tests that gesture end is delivered after nested gesture processing.
TEST_F(WindowEventDispatcherTest, GestureEndDeliveredAfterNestedGestures)
{
    NestedGestureDelegate d1(NULL, gfx::Point());
    scoped_ptr<Window> w1(CreateNormalWindow(1, root_window(), &d1));
    w1->SetBounds(gfx::Rect(0, 0, 100, 100));

    ui::test::EventGenerator nested_generator(root_window(), w1.get());
    NestedGestureDelegate d2(&nested_generator, w1->bounds().CenterPoint());
    scoped_ptr<Window> w2(CreateNormalWindow(1, root_window(), &d2));
    w2->SetBounds(gfx::Rect(100, 0, 100, 100));

    // Tap on w2 which triggers nested gestures for w1.
    ui::test::EventGenerator generator(root_window(), w2.get());
    generator.GestureTapAt(w2->bounds().CenterPoint());

    // Both windows should get their gesture end events.
    EXPECT_EQ(1, d1.gesture_end_count());
    EXPECT_EQ(1, d2.gesture_end_count());
}

// Tests whether we can repost the Tap down gesture event.
TEST_F(WindowEventDispatcherTest, RepostTapdownGestureTest)
{
    EventFilterRecorder recorder;
    root_window()->AddPreTargetHandler(&recorder);

    test::TestWindowDelegate delegate;
    scoped_ptr<aura::Window> window(CreateTestWindowWithDelegate(
        &delegate, 1, gfx::Rect(0, 0, 100, 100), root_window()));

    ui::GestureEventDetails details(ui::ET_GESTURE_TAP_DOWN);
    gfx::Point point(10, 10);
    ui::GestureEvent event(point.x(),
        point.y(),
        0,
        ui::EventTimeForNow(),
        details);
    host()->dispatcher()->RepostEvent(&event);
    RunAllPendingInMessageLoop();
    // TODO(rbyers): Currently disabled - crbug.com/170987
    EXPECT_FALSE(EventTypesToString(recorder.events()).find("GESTURE_TAP_DOWN") != std::string::npos);
    recorder.Reset();
    root_window()->RemovePreTargetHandler(&recorder);
}

// This class inherits from the EventFilterRecorder class which provides a
// facility to record events. This class additionally provides a facility to
// repost the ET_GESTURE_TAP_DOWN gesture to the target window and records
// events after that.
class RepostGestureEventRecorder : public EventFilterRecorder {
public:
    RepostGestureEventRecorder(aura::Window* repost_source,
        aura::Window* repost_target)
        : repost_source_(repost_source)
        , repost_target_(repost_target)
        , reposted_(false)
        , done_cleanup_(false)
    {
    }

    ~RepostGestureEventRecorder() override { }

    void OnTouchEvent(ui::TouchEvent* event) override
    {
        if (reposted_ && event->type() == ui::ET_TOUCH_PRESSED) {
            done_cleanup_ = true;
            Reset();
        }
        EventFilterRecorder::OnTouchEvent(event);
    }

    void OnGestureEvent(ui::GestureEvent* event) override
    {
        EXPECT_EQ(done_cleanup_ ? repost_target_ : repost_source_, event->target());
        if (event->type() == ui::ET_GESTURE_TAP_DOWN) {
            if (!reposted_) {
                EXPECT_NE(repost_target_, event->target());
                reposted_ = true;
                repost_target_->GetHost()->dispatcher()->RepostEvent(event);
                // Ensure that the reposted gesture event above goes to the
                // repost_target_;
                repost_source_->GetRootWindow()->RemoveChild(repost_source_);
                return;
            }
        }
        EventFilterRecorder::OnGestureEvent(event);
    }

    // Ignore mouse events as they don't fire at all times. This causes
    // the GestureRepostEventOrder test to fail randomly.
    void OnMouseEvent(ui::MouseEvent* event) override { }

private:
    aura::Window* repost_source_;
    aura::Window* repost_target_;
    // set to true if we reposted the ET_GESTURE_TAP_DOWN event.
    bool reposted_;
    // set true if we're done cleaning up after hiding repost_source_;
    bool done_cleanup_;
    DISALLOW_COPY_AND_ASSIGN(RepostGestureEventRecorder);
};

// Tests whether events which are generated after the reposted gesture event
// are received after that. In this case the scroll sequence events should
// be received after the reposted gesture event.
TEST_F(WindowEventDispatcherTest, GestureRepostEventOrder)
{
    // Expected events at the end for the repost_target window defined below.
    const char kExpectedTargetEvents[] =
        // TODO)(rbyers): Gesture event reposting is disabled - crbug.com/279039.
        // "GESTURE_BEGIN GESTURE_TAP_DOWN "
        "TOUCH_PRESSED GESTURE_BEGIN GESTURE_TAP_DOWN TOUCH_MOVED "
        "GESTURE_TAP_CANCEL GESTURE_SCROLL_BEGIN GESTURE_SCROLL_UPDATE TOUCH_MOVED "
        "GESTURE_SCROLL_UPDATE TOUCH_MOVED GESTURE_SCROLL_UPDATE TOUCH_RELEASED "
        "GESTURE_SCROLL_END GESTURE_END";
    // We create two windows.
    // The first window (repost_source) is the one to which the initial tap
    // gesture is sent. It reposts this event to the second window
    // (repost_target).
    // We then generate the scroll sequence for repost_target and look for two
    // ET_GESTURE_TAP_DOWN events in the event list at the end.
    test::TestWindowDelegate delegate;
    scoped_ptr<aura::Window> repost_target(CreateTestWindowWithDelegate(
        &delegate, 1, gfx::Rect(0, 0, 100, 100), root_window()));

    scoped_ptr<aura::Window> repost_source(CreateTestWindowWithDelegate(
        &delegate, 1, gfx::Rect(0, 0, 50, 50), root_window()));

    RepostGestureEventRecorder repost_event_recorder(repost_source.get(),
        repost_target.get());
    root_window()->AddPreTargetHandler(&repost_event_recorder);

    // Generate a tap down gesture for the repost_source. This will be reposted
    // to repost_target.
    ui::test::EventGenerator repost_generator(root_window(), repost_source.get());
    repost_generator.GestureTapAt(gfx::Point(40, 40));
    RunAllPendingInMessageLoop();

    ui::test::EventGenerator scroll_generator(root_window(), repost_target.get());
    scroll_generator.GestureScrollSequence(
        gfx::Point(80, 80),
        gfx::Point(100, 100),
        base::TimeDelta::FromMilliseconds(100),
        3);
    RunAllPendingInMessageLoop();

    int tap_down_count = 0;
    for (size_t i = 0; i < repost_event_recorder.events().size(); ++i) {
        if (repost_event_recorder.events()[i] == ui::ET_GESTURE_TAP_DOWN)
            ++tap_down_count;
    }

    // We expect two tap down events. One from the repost and the other one from
    // the scroll sequence posted above.
    // TODO(rbyers): Currently disabled - crbug.com/170987
    EXPECT_EQ(1, tap_down_count);

    EXPECT_EQ(kExpectedTargetEvents,
        EventTypesToString(repost_event_recorder.events()));
    root_window()->RemovePreTargetHandler(&repost_event_recorder);
}

// An event filter that deletes the specified object when sees a mouse-exited
// event.
template <class T>
class OnMouseExitDeletingEventFilter : public EventFilterRecorder {
public:
    explicit OnMouseExitDeletingEventFilter(T* object_to_delete)
        : object_to_delete_(object_to_delete)
    {
    }
    OnMouseExitDeletingEventFilter()
        : object_to_delete_(nullptr)
    {
    }
    ~OnMouseExitDeletingEventFilter() override { }

    void set_object_to_delete(T* object_to_delete)
    {
        object_to_delete_ = object_to_delete;
    }

private:
    // Overridden from ui::EventFilterRecorder.
    void OnMouseEvent(ui::MouseEvent* event) override
    {
        EventFilterRecorder::OnMouseEvent(event);
        if (object_to_delete_ && event->type() == ui::ET_MOUSE_EXITED) {
            delete object_to_delete_;
            object_to_delete_ = nullptr;
        }
    }

    T* object_to_delete_;

    DISALLOW_COPY_AND_ASSIGN(OnMouseExitDeletingEventFilter);
};

// Tests that RootWindow drops mouse-moved event that is supposed to be sent to
// a child, but the child is destroyed because of the synthesized mouse-exit
// event generated on the previous mouse_moved_handler_.
TEST_F(WindowEventDispatcherTest, DeleteWindowDuringMouseMovedDispatch)
{
    // Create window 1 and set its event filter. Window 1 will take ownership of
    // the event filter.
    scoped_ptr<Window> w1(CreateNormalWindow(1, root_window(), NULL));
    OnMouseExitDeletingEventFilter<Window> w1_filter;
    w1->AddPreTargetHandler(&w1_filter);
    w1->SetBounds(gfx::Rect(20, 20, 60, 60));
    EXPECT_EQ(NULL, host()->dispatcher()->mouse_moved_handler());

    ui::test::EventGenerator generator(root_window(), w1.get());

    // Move mouse over window 1 to set it as the |mouse_moved_handler_| for the
    // root window.
    generator.MoveMouseTo(51, 51);
    EXPECT_EQ(w1.get(), host()->dispatcher()->mouse_moved_handler());

    // Create window 2 under the mouse cursor and stack it above window 1.
    Window* w2 = CreateNormalWindow(2, root_window(), NULL);
    w2->SetBounds(gfx::Rect(30, 30, 40, 40));
    root_window()->StackChildAbove(w2, w1.get());

    // Set window 2 as the window that is to be deleted when a mouse-exited event
    // happens on window 1.
    w1_filter.set_object_to_delete(w2);

    // Move mouse over window 2. This should generate a mouse-exited event for
    // window 1 resulting in deletion of window 2. The original mouse-moved event
    // that was targeted to window 2 should be dropped since window 2 is
    // destroyed. This test passes if no crash happens.
    generator.MoveMouseTo(52, 52);
    EXPECT_EQ(NULL, host()->dispatcher()->mouse_moved_handler());

    // Check events received by window 1.
    EXPECT_EQ("MOUSE_ENTERED MOUSE_MOVED MOUSE_EXITED",
        EventTypesToString(w1_filter.events()));
}

// Tests the case where the event dispatcher is deleted during the pre-dispatch
// phase of dispatching and event.
TEST_F(WindowEventDispatcherTest, DeleteDispatcherDuringPreDispatch)
{
    // Create a host for the window hierarchy. This host will be destroyed later
    // on.
    WindowTreeHost* host = WindowTreeHost::Create(gfx::Rect(0, 0, 100, 100));
    host->InitHost();

    // Create two windows.
    Window* w1 = CreateNormalWindow(1, host->window(), nullptr);
    w1->SetBounds(gfx::Rect(20, 20, 60, 60));
    Window* w2 = CreateNormalWindow(2, host->window(), nullptr);
    w2->SetBounds(gfx::Rect(80, 20, 120, 60));
    EXPECT_EQ(nullptr, host->dispatcher()->mouse_moved_handler());

    ui::test::EventGenerator generator(host->window(), w1);

    // Move mouse over window 1 to set it as the |mouse_moved_handler_| for the
    // root window.
    generator.MoveMouseTo(40, 40);
    EXPECT_EQ(w1, host->dispatcher()->mouse_moved_handler());

    // Set appropriate event filters for the two windows with the window tree host
    // as the object that is to be deleted when a mouse-exited event happens on
    // window 1. The windows will take ownership of the event filters.
    OnMouseExitDeletingEventFilter<WindowTreeHost> w1_filter(host);
    w1->AddPreTargetHandler(&w1_filter);
    EventFilterRecorder w2_filter;
    w2->AddPreTargetHandler(&w2_filter);

    // Move mouse over window 2. This should generate a mouse-exited event for
    // window 1 resulting in deletion of window tree host and its event
    // dispatcher. The event dispatching should abort since the dispatcher is
    // destroyed. This test passes if no crash happens.
    // Here we can't use EventGenerator since it expects that the dispatcher is
    // not destroyed at the end of the dispatch.
    ui::MouseEvent mouse_move(ui::ET_MOUSE_MOVED, gfx::Point(20, 20),
        gfx::Point(20, 20), base::TimeDelta(), 0, 0);
    ui::EventDispatchDetails details = host->dispatcher()->DispatchEvent(w2, &mouse_move);
    EXPECT_TRUE(details.dispatcher_destroyed);

    // Check events received by the two windows.
    EXPECT_EQ("MOUSE_EXITED", EventTypesToString(w1_filter.events()));
    EXPECT_EQ(std::string(), EventTypesToString(w2_filter.events()));
}

namespace {

    // Used to track if OnWindowDestroying() is invoked and if there is a valid
    // RootWindow at such time.
    class ValidRootDuringDestructionWindowObserver : public aura::WindowObserver {
    public:
        ValidRootDuringDestructionWindowObserver(bool* got_destroying,
            bool* has_valid_root)
            : got_destroying_(got_destroying)
            , has_valid_root_(has_valid_root)
        {
        }

        // WindowObserver:
        void OnWindowDestroying(aura::Window* window) override
        {
            *got_destroying_ = true;
            *has_valid_root_ = (window->GetRootWindow() != NULL);
        }

    private:
        bool* got_destroying_;
        bool* has_valid_root_;

        DISALLOW_COPY_AND_ASSIGN(ValidRootDuringDestructionWindowObserver);
    };

} // namespace

// Verifies GetRootWindow() from ~Window returns a valid root.
TEST_F(WindowEventDispatcherTest, ValidRootDuringDestruction)
{
    bool got_destroying = false;
    bool has_valid_root = false;
    ValidRootDuringDestructionWindowObserver observer(&got_destroying,
        &has_valid_root);
    {
        scoped_ptr<WindowTreeHost> host(
            WindowTreeHost::Create(gfx::Rect(0, 0, 100, 100)));
        host->InitHost();
        // Owned by WindowEventDispatcher.
        Window* w1 = CreateNormalWindow(1, host->window(), NULL);
        w1->AddObserver(&observer);
    }
    EXPECT_TRUE(got_destroying);
    EXPECT_TRUE(has_valid_root);
}

namespace {

    // See description above DontResetHeldEvent for details.
    class DontResetHeldEventWindowDelegate : public test::TestWindowDelegate {
    public:
        explicit DontResetHeldEventWindowDelegate(aura::Window* root)
            : root_(root)
            , mouse_event_count_(0)
        {
        }
        ~DontResetHeldEventWindowDelegate() override { }

        int mouse_event_count() const { return mouse_event_count_; }

        // TestWindowDelegate:
        void OnMouseEvent(ui::MouseEvent* event) override
        {
            if ((event->flags() & ui::EF_SHIFT_DOWN) != 0 && mouse_event_count_++ == 0) {
                ui::MouseEvent mouse_event(ui::ET_MOUSE_PRESSED, gfx::Point(10, 10),
                    gfx::Point(10, 10), ui::EventTimeForNow(),
                    ui::EF_SHIFT_DOWN, 0);
                root_->GetHost()->dispatcher()->RepostEvent(&mouse_event);
            }
        }

    private:
        Window* root_;
        int mouse_event_count_;

        DISALLOW_COPY_AND_ASSIGN(DontResetHeldEventWindowDelegate);
    };

} // namespace

// Verifies RootWindow doesn't reset |RootWindow::held_repostable_event_| after
// dispatching. This is done by using DontResetHeldEventWindowDelegate, which
// tracks the number of events with ui::EF_SHIFT_DOWN set (all reposted events
// have EF_SHIFT_DOWN). When the first event is seen RepostEvent() is used to
// schedule another reposted event.
TEST_F(WindowEventDispatcherTest, DontResetHeldEvent)
{
    DontResetHeldEventWindowDelegate delegate(root_window());
    scoped_ptr<Window> w1(CreateNormalWindow(1, root_window(), &delegate));
    w1->SetBounds(gfx::Rect(0, 0, 40, 40));
    ui::MouseEvent pressed(ui::ET_MOUSE_PRESSED, gfx::Point(10, 10),
        gfx::Point(10, 10), ui::EventTimeForNow(),
        ui::EF_SHIFT_DOWN, 0);
    root_window()->GetHost()->dispatcher()->RepostEvent(&pressed);
    ui::MouseEvent pressed2(ui::ET_MOUSE_PRESSED, gfx::Point(10, 10),
        gfx::Point(10, 10), ui::EventTimeForNow(), 0, 0);
    // Dispatch an event to flush event scheduled by way of RepostEvent().
    DispatchEventUsingWindowDispatcher(&pressed2);
    // Delegate should have seen reposted event (identified by way of
    // EF_SHIFT_DOWN). Dispatch another event to flush the second
    // RepostedEvent().
    EXPECT_EQ(1, delegate.mouse_event_count());
    DispatchEventUsingWindowDispatcher(&pressed2);
    EXPECT_EQ(2, delegate.mouse_event_count());
}

namespace {

    // See description above DeleteHostFromHeldMouseEvent for details.
    class DeleteHostFromHeldMouseEventDelegate
        : public test::TestWindowDelegate {
    public:
        explicit DeleteHostFromHeldMouseEventDelegate(WindowTreeHost* host)
            : host_(host)
            , got_mouse_event_(false)
            , got_destroy_(false)
        {
        }
        ~DeleteHostFromHeldMouseEventDelegate() override { }

        bool got_mouse_event() const { return got_mouse_event_; }
        bool got_destroy() const { return got_destroy_; }

        // TestWindowDelegate:
        void OnMouseEvent(ui::MouseEvent* event) override
        {
            if ((event->flags() & ui::EF_SHIFT_DOWN) != 0) {
                got_mouse_event_ = true;
                delete host_;
            }
        }
        void OnWindowDestroyed(Window* window) override { got_destroy_ = true; }

    private:
        WindowTreeHost* host_;
        bool got_mouse_event_;
        bool got_destroy_;

        DISALLOW_COPY_AND_ASSIGN(DeleteHostFromHeldMouseEventDelegate);
    };

} // namespace

// Verifies if a WindowTreeHost is deleted from dispatching a held mouse event
// we don't crash.
TEST_F(WindowEventDispatcherTest, DeleteHostFromHeldMouseEvent)
{
    // Should be deleted by |delegate|.
    WindowTreeHost* h2 = WindowTreeHost::Create(gfx::Rect(0, 0, 100, 100));
    h2->InitHost();
    DeleteHostFromHeldMouseEventDelegate delegate(h2);
    // Owned by |h2|.
    Window* w1 = CreateNormalWindow(1, h2->window(), &delegate);
    w1->SetBounds(gfx::Rect(0, 0, 40, 40));
    ui::MouseEvent pressed(ui::ET_MOUSE_PRESSED, gfx::Point(10, 10),
        gfx::Point(10, 10), ui::EventTimeForNow(),
        ui::EF_SHIFT_DOWN, 0);
    h2->dispatcher()->RepostEvent(&pressed);
    // RunAllPendingInMessageLoop() to make sure the |pressed| is run.
    RunAllPendingInMessageLoop();
    EXPECT_TRUE(delegate.got_mouse_event());
    EXPECT_TRUE(delegate.got_destroy());
}

TEST_F(WindowEventDispatcherTest, WindowHideCancelsActiveTouches)
{
    EventFilterRecorder recorder;
    root_window()->AddPreTargetHandler(&recorder);

    test::TestWindowDelegate delegate;
    scoped_ptr<aura::Window> window(CreateTestWindowWithDelegate(
        &delegate, 1, gfx::Rect(0, 0, 100, 100), root_window()));

    gfx::Point position1 = root_window()->bounds().origin();
    ui::TouchEvent press(
        ui::ET_TOUCH_PRESSED, position1, 0, ui::EventTimeForNow());
    DispatchEventUsingWindowDispatcher(&press);

    EXPECT_EQ("TOUCH_PRESSED GESTURE_BEGIN GESTURE_TAP_DOWN",
        EventTypesToString(recorder.GetAndResetEvents()));

    window->Hide();

    EXPECT_EQ(ui::ET_TOUCH_CANCELLED, recorder.events()[0]);
    EXPECT_TRUE(recorder.HasReceivedEvent(ui::ET_GESTURE_TAP_CANCEL));
    EXPECT_TRUE(recorder.HasReceivedEvent(ui::ET_GESTURE_END));
    EXPECT_EQ(3U, recorder.events().size());
    root_window()->RemovePreTargetHandler(&recorder);
}

TEST_F(WindowEventDispatcherTest, WindowHideCancelsActiveGestures)
{
    EventFilterRecorder recorder;
    root_window()->AddPreTargetHandler(&recorder);

    test::TestWindowDelegate delegate;
    scoped_ptr<aura::Window> window(CreateTestWindowWithDelegate(
        &delegate, 1, gfx::Rect(0, 0, 100, 100), root_window()));

    gfx::Point position1 = root_window()->bounds().origin();
    gfx::Point position2 = root_window()->bounds().CenterPoint();
    ui::TouchEvent press(
        ui::ET_TOUCH_PRESSED, position1, 0, ui::EventTimeForNow());
    DispatchEventUsingWindowDispatcher(&press);

    ui::TouchEvent move(
        ui::ET_TOUCH_MOVED, position2, 0, ui::EventTimeForNow());
    DispatchEventUsingWindowDispatcher(&move);

    ui::TouchEvent press2(
        ui::ET_TOUCH_PRESSED, position1, 1, ui::EventTimeForNow());
    DispatchEventUsingWindowDispatcher(&press2);

    // TODO(tdresser): once the unified Gesture Recognizer has stuck, remove the
    // special casing here. See crbug.com/332418 for details.
    std::string expected = "TOUCH_PRESSED GESTURE_BEGIN GESTURE_TAP_DOWN TOUCH_MOVED "
                           "GESTURE_TAP_CANCEL GESTURE_SCROLL_BEGIN GESTURE_SCROLL_UPDATE "
                           "TOUCH_PRESSED GESTURE_BEGIN GESTURE_PINCH_BEGIN";

    std::string expected_ugr = "TOUCH_PRESSED GESTURE_BEGIN GESTURE_TAP_DOWN TOUCH_MOVED "
                               "GESTURE_TAP_CANCEL GESTURE_SCROLL_BEGIN GESTURE_SCROLL_UPDATE "
                               "TOUCH_PRESSED GESTURE_BEGIN";

    std::string events_string = EventTypesToString(recorder.GetAndResetEvents());
    EXPECT_TRUE((expected == events_string) || (expected_ugr == events_string));

    window->Hide();

    expected = "TOUCH_CANCELLED GESTURE_PINCH_END GESTURE_END TOUCH_CANCELLED "
               "GESTURE_SCROLL_END GESTURE_END";
    expected_ugr = "TOUCH_CANCELLED GESTURE_SCROLL_END GESTURE_END TOUCH_CANCELLED "
                   "GESTURE_END";

    events_string = EventTypesToString(recorder.GetAndResetEvents());
    EXPECT_TRUE((expected == events_string) || (expected_ugr == events_string));

    root_window()->RemovePreTargetHandler(&recorder);
}

// Places two windows side by side. Presses down on one window, and starts a
// scroll. Sets capture on the other window and ensures that the "ending" events
// aren't sent to the window which gained capture.
TEST_F(WindowEventDispatcherTest, EndingEventDoesntRetarget)
{
    EventFilterRecorder recorder1;
    EventFilterRecorder recorder2;
    scoped_ptr<Window> window1(CreateNormalWindow(1, root_window(), NULL));
    window1->SetBounds(gfx::Rect(0, 0, 40, 40));

    scoped_ptr<Window> window2(CreateNormalWindow(2, root_window(), NULL));
    window2->SetBounds(gfx::Rect(40, 0, 40, 40));

    window1->AddPreTargetHandler(&recorder1);
    window2->AddPreTargetHandler(&recorder2);

    gfx::Point position = window1->bounds().origin();
    ui::TouchEvent press(
        ui::ET_TOUCH_PRESSED, position, 0, ui::EventTimeForNow());
    DispatchEventUsingWindowDispatcher(&press);

    gfx::Point position2 = window1->bounds().CenterPoint();
    ui::TouchEvent move(
        ui::ET_TOUCH_MOVED, position2, 0, ui::EventTimeForNow());
    DispatchEventUsingWindowDispatcher(&move);

    window2->SetCapture();

    EXPECT_EQ("TOUCH_PRESSED GESTURE_BEGIN GESTURE_TAP_DOWN TOUCH_MOVED "
              "GESTURE_TAP_CANCEL GESTURE_SCROLL_BEGIN GESTURE_SCROLL_UPDATE "
              "TOUCH_CANCELLED GESTURE_SCROLL_END GESTURE_END",
        EventTypesToString(recorder1.events()));

    EXPECT_TRUE(recorder2.events().empty());
}

namespace {

    // This class creates and manages a window which is destroyed as soon as
    // capture is lost. This is the case for the drag and drop capture window.
    class CaptureWindowTracker : public test::TestWindowDelegate {
    public:
        CaptureWindowTracker() { }
        ~CaptureWindowTracker() override { }

        void CreateCaptureWindow(aura::Window* root_window)
        {
            capture_window_.reset(test::CreateTestWindowWithDelegate(
                this, -1234, gfx::Rect(20, 20, 20, 20), root_window));
            capture_window_->SetCapture();
        }

        void reset()
        {
            capture_window_.reset();
        }

        void OnCaptureLost() override { capture_window_.reset(); }

        void OnWindowDestroyed(Window* window) override
        {
            TestWindowDelegate::OnWindowDestroyed(window);
            capture_window_.reset();
        }

        aura::Window* capture_window() { return capture_window_.get(); }

    private:
        scoped_ptr<aura::Window> capture_window_;

        DISALLOW_COPY_AND_ASSIGN(CaptureWindowTracker);
    };

}

// Verifies handling loss of capture by the capture window being hidden.
TEST_F(WindowEventDispatcherTest, CaptureWindowHidden)
{
    CaptureWindowTracker capture_window_tracker;
    capture_window_tracker.CreateCaptureWindow(root_window());
    capture_window_tracker.capture_window()->Hide();
    EXPECT_EQ(NULL, capture_window_tracker.capture_window());
}

// Verifies handling loss of capture by the capture window being destroyed.
TEST_F(WindowEventDispatcherTest, CaptureWindowDestroyed)
{
    CaptureWindowTracker capture_window_tracker;
    capture_window_tracker.CreateCaptureWindow(root_window());
    capture_window_tracker.reset();
    EXPECT_EQ(NULL, capture_window_tracker.capture_window());
}

class ExitMessageLoopOnMousePress : public ui::test::TestEventHandler {
public:
    ExitMessageLoopOnMousePress() { }
    ~ExitMessageLoopOnMousePress() override { }

protected:
    void OnMouseEvent(ui::MouseEvent* event) override
    {
        ui::test::TestEventHandler::OnMouseEvent(event);
        if (event->type() == ui::ET_MOUSE_PRESSED)
            base::MessageLoopForUI::current()->QuitWhenIdle();
    }

private:
    DISALLOW_COPY_AND_ASSIGN(ExitMessageLoopOnMousePress);
};

class WindowEventDispatcherTestWithMessageLoop
    : public WindowEventDispatcherTest {
public:
    WindowEventDispatcherTestWithMessageLoop() { }
    ~WindowEventDispatcherTestWithMessageLoop() override { }

    void RunTest()
    {
        // Reset any event the window may have received when bringing up the window
        // (e.g. mouse-move events if the mouse cursor is over the window).
        handler_.Reset();

        // Start a nested message-loop, post an event to be dispatched, and then
        // terminate the message-loop. When the message-loop unwinds and gets back,
        // the reposted event should not have fired.
        scoped_ptr<ui::MouseEvent> mouse(new ui::MouseEvent(
            ui::ET_MOUSE_PRESSED, gfx::Point(10, 10), gfx::Point(10, 10),
            ui::EventTimeForNow(), ui::EF_NONE, ui::EF_NONE));
        message_loop()->PostTask(
            FROM_HERE,
            base::Bind(&WindowEventDispatcherTestWithMessageLoop::RepostEventHelper,
                host()->dispatcher(),
                base::Passed(&mouse)));
        message_loop()->PostTask(FROM_HERE, message_loop()->QuitWhenIdleClosure());

        base::MessageLoop::ScopedNestableTaskAllower allow(message_loop());
        base::RunLoop loop;
        loop.Run();
        EXPECT_EQ(0, handler_.num_mouse_events());

        // Let the current message-loop run. The event-handler will terminate the
        // message-loop when it receives the reposted event.
    }

    base::MessageLoop* message_loop()
    {
        return base::MessageLoopForUI::current();
    }

protected:
    void SetUp() override
    {
        WindowEventDispatcherTest::SetUp();
        window_.reset(CreateNormalWindow(1, root_window(), NULL));
        window_->AddPreTargetHandler(&handler_);
    }

    void TearDown() override
    {
        window_.reset();
        WindowEventDispatcherTest::TearDown();
    }

private:
    // Used to avoid a copying |event| when binding to a closure.
    static void RepostEventHelper(WindowEventDispatcher* dispatcher,
        scoped_ptr<ui::MouseEvent> event)
    {
        dispatcher->RepostEvent(event.get());
    }

    scoped_ptr<Window> window_;
    ExitMessageLoopOnMousePress handler_;

    DISALLOW_COPY_AND_ASSIGN(WindowEventDispatcherTestWithMessageLoop);
};

TEST_F(WindowEventDispatcherTestWithMessageLoop, EventRepostedInNonNestedLoop)
{
    CHECK(!message_loop()->is_running());
    // Perform the test in a callback, so that it runs after the message-loop
    // starts.
    message_loop()->PostTask(
        FROM_HERE, base::Bind(&WindowEventDispatcherTestWithMessageLoop::RunTest, base::Unretained(this)));
    message_loop()->Run();
}

class WindowEventDispatcherTestInHighDPI : public WindowEventDispatcherTest {
public:
    WindowEventDispatcherTestInHighDPI() { }
    ~WindowEventDispatcherTestInHighDPI() override { }

    void DispatchEvent(ui::Event* event)
    {
        DispatchEventUsingWindowDispatcher(event);
    }

protected:
    void SetUp() override
    {
        WindowEventDispatcherTest::SetUp();
        test_screen()->SetDeviceScaleFactor(2.f);
    }
};

TEST_F(WindowEventDispatcherTestInHighDPI, EventLocationTransform)
{
    test::TestWindowDelegate delegate;
    scoped_ptr<aura::Window> child(test::CreateTestWindowWithDelegate(&delegate,
        1234, gfx::Rect(20, 20, 100, 100), root_window()));
    child->Show();

    ui::test::TestEventHandler handler_child;
    ui::test::TestEventHandler handler_root;
    root_window()->AddPreTargetHandler(&handler_root);
    child->AddPreTargetHandler(&handler_child);

    {
        ui::MouseEvent move(ui::ET_MOUSE_MOVED, gfx::Point(30, 30),
            gfx::Point(30, 30), ui::EventTimeForNow(), ui::EF_NONE,
            ui::EF_NONE);
        DispatchEventUsingWindowDispatcher(&move);
        EXPECT_EQ(0, handler_child.num_mouse_events());
        EXPECT_EQ(1, handler_root.num_mouse_events());
    }

    {
        ui::MouseEvent move(ui::ET_MOUSE_MOVED, gfx::Point(50, 50),
            gfx::Point(50, 50), ui::EventTimeForNow(), ui::EF_NONE,
            ui::EF_NONE);
        DispatchEventUsingWindowDispatcher(&move);
        // The child receives an ENTER, and a MOVED event.
        EXPECT_EQ(2, handler_child.num_mouse_events());
        // The root receives both the ENTER and the MOVED events dispatched to
        // |child|, as well as an EXIT event.
        EXPECT_EQ(3, handler_root.num_mouse_events());
    }

    child->RemovePreTargetHandler(&handler_child);
    root_window()->RemovePreTargetHandler(&handler_root);
}

TEST_F(WindowEventDispatcherTestInHighDPI, TouchMovesHeldOnScroll)
{
    EventFilterRecorder recorder;
    root_window()->AddPreTargetHandler(&recorder);
    test::TestWindowDelegate delegate;
    HoldPointerOnScrollHandler handler(host()->dispatcher(), &recorder);
    scoped_ptr<aura::Window> window(CreateTestWindowWithDelegate(
        &delegate, 1, gfx::Rect(50, 50, 100, 100), root_window()));
    window->AddPreTargetHandler(&handler);

    ui::test::EventGenerator generator(root_window());
    generator.GestureScrollSequence(
        gfx::Point(120, 120), gfx::Point(20, 120),
        base::TimeDelta::FromMilliseconds(100), 25);

    // |handler| will have reset |filter| and started holding the touch-move
    // events when scrolling started. At the end of the scroll (i.e. upon
    // touch-release), the held touch-move event will have been dispatched first,
    // along with the subsequent events (i.e. touch-release, scroll-end, and
    // gesture-end).
    const EventFilterRecorder::Events& events = recorder.events();
    EXPECT_EQ(
        "TOUCH_MOVED GESTURE_SCROLL_UPDATE TOUCH_RELEASED "
        "GESTURE_SCROLL_END GESTURE_END",
        EventTypesToString(events));
    ASSERT_EQ(2u, recorder.touch_locations().size());
    EXPECT_EQ(gfx::Point(-40, 10).ToString(),
        recorder.touch_locations()[0].ToString());
    EXPECT_EQ(gfx::Point(-40, 10).ToString(),
        recorder.touch_locations()[1].ToString());
    root_window()->RemovePreTargetHandler(&recorder);
}

// This handler triggers a nested message loop when it receives a right click
// event, and runs a single callback in the nested message loop.
class TriggerNestedLoopOnRightMousePress : public ui::test::TestEventHandler {
public:
    explicit TriggerNestedLoopOnRightMousePress(const base::Closure& callback)
        : callback_(callback)
    {
    }
    ~TriggerNestedLoopOnRightMousePress() override { }

    const gfx::Point mouse_move_location() const { return mouse_move_location_; }

private:
    void OnMouseEvent(ui::MouseEvent* mouse) override
    {
        TestEventHandler::OnMouseEvent(mouse);
        if (mouse->type() == ui::ET_MOUSE_PRESSED && mouse->IsOnlyRightMouseButton()) {
            base::MessageLoop::ScopedNestableTaskAllower allow(
                base::MessageLoopForUI::current());
            base::RunLoop run_loop;
            scoped_refptr<base::TaskRunner> task_runner = base::ThreadTaskRunnerHandle::Get();
            if (!callback_.is_null())
                task_runner->PostTask(FROM_HERE, callback_);
            task_runner->PostTask(FROM_HERE, run_loop.QuitClosure());
            run_loop.Run();
        } else if (mouse->type() == ui::ET_MOUSE_MOVED) {
            mouse_move_location_ = mouse->location();
        }
    }

    base::Closure callback_;
    gfx::Point mouse_move_location_;

    DISALLOW_COPY_AND_ASSIGN(TriggerNestedLoopOnRightMousePress);
};

// Tests that if dispatching a 'held' event triggers a nested message loop, then
// the events that are dispatched from the nested message loop are transformed
// correctly.
TEST_F(WindowEventDispatcherTestInHighDPI,
    EventsTransformedInRepostedEventTriggeredNestedLoop)
{
    scoped_ptr<Window> window(CreateNormalWindow(1, root_window(), NULL));
    // Make sure the window is visible.
    RunAllPendingInMessageLoop();

    ui::MouseEvent mouse_move(ui::ET_MOUSE_MOVED, gfx::Point(80, 80),
        gfx::Point(80, 80), ui::EventTimeForNow(),
        ui::EF_NONE, ui::EF_NONE);
    const base::Closure callback_on_right_click = base::Bind(
        base::IgnoreResult(&WindowEventDispatcherTestInHighDPI::DispatchEvent),
        base::Unretained(this), base::Unretained(&mouse_move));
    TriggerNestedLoopOnRightMousePress handler(callback_on_right_click);
    window->AddPreTargetHandler(&handler);

    scoped_ptr<ui::MouseEvent> mouse(
        new ui::MouseEvent(ui::ET_MOUSE_PRESSED, gfx::Point(10, 10),
            gfx::Point(10, 10), ui::EventTimeForNow(),
            ui::EF_RIGHT_MOUSE_BUTTON, ui::EF_RIGHT_MOUSE_BUTTON));
    host()->dispatcher()->RepostEvent(mouse.get());
    EXPECT_EQ(0, handler.num_mouse_events());

    base::RunLoop run_loop;
    run_loop.RunUntilIdle();
    // The window should receive the mouse-press and the mouse-move events.
    EXPECT_EQ(2, handler.num_mouse_events());
    // The mouse-move event location should be transformed because of the DSF
    // before it reaches the window.
    EXPECT_EQ(gfx::Point(40, 40).ToString(),
        handler.mouse_move_location().ToString());
    EXPECT_EQ(gfx::Point(40, 40).ToString(),
        Env::GetInstance()->last_mouse_location().ToString());
    window->RemovePreTargetHandler(&handler);
}

class SelfDestructDelegate : public test::TestWindowDelegate {
public:
    SelfDestructDelegate() { }
    ~SelfDestructDelegate() override { }

    void OnMouseEvent(ui::MouseEvent* event) override { window_.reset(); }

    void set_window(scoped_ptr<aura::Window> window)
    {
        window_ = std::move(window);
    }
    bool has_window() const { return !!window_.get(); }

private:
    scoped_ptr<aura::Window> window_;
    DISALLOW_COPY_AND_ASSIGN(SelfDestructDelegate);
};

TEST_F(WindowEventDispatcherTest, SynthesizedLocatedEvent)
{
    ui::test::EventGenerator generator(root_window());
    generator.MoveMouseTo(10, 10);
    EXPECT_EQ("10,10",
        Env::GetInstance()->last_mouse_location().ToString());

    // Synthesized event should not update the mouse location.
    ui::MouseEvent mouseev(ui::ET_MOUSE_MOVED, gfx::Point(), gfx::Point(),
        ui::EventTimeForNow(), ui::EF_IS_SYNTHESIZED, 0);
    generator.Dispatch(&mouseev);
    EXPECT_EQ("10,10",
        Env::GetInstance()->last_mouse_location().ToString());

    generator.MoveMouseTo(0, 0);
    EXPECT_EQ("0,0",
        Env::GetInstance()->last_mouse_location().ToString());

    // Make sure the location gets updated when a syntheiszed enter
    // event destroyed the window.
    SelfDestructDelegate delegate;
    scoped_ptr<aura::Window> window(CreateTestWindowWithDelegate(
        &delegate, 1, gfx::Rect(50, 50, 100, 100), root_window()));
    delegate.set_window(std::move(window));
    EXPECT_TRUE(delegate.has_window());

    generator.MoveMouseTo(100, 100);
    EXPECT_FALSE(delegate.has_window());
    EXPECT_EQ("100,100",
        Env::GetInstance()->last_mouse_location().ToString());
}

// Tests that the window which has capture can get destroyed as a result of
// ui::ET_MOUSE_CAPTURE_CHANGED event dispatched in
// WindowEventDispatcher::UpdateCapture without causing a "use after free".
TEST_F(WindowEventDispatcherTest, DestroyWindowOnCaptureChanged)
{
    SelfDestructDelegate delegate;
    scoped_ptr<aura::Window> window_first(CreateTestWindowWithDelegate(
        &delegate, 1, gfx::Rect(20, 10, 10, 20), root_window()));
    Window* window_first_raw = window_first.get();
    window_first->Show();
    window_first->SetCapture();
    delegate.set_window(std::move(window_first));
    EXPECT_TRUE(delegate.has_window());

    scoped_ptr<aura::Window> window_second(
        test::CreateTestWindowWithId(2, root_window()));
    window_second->Show();

    client::CaptureDelegate* capture_delegate = host()->dispatcher();
    capture_delegate->UpdateCapture(window_first_raw, window_second.get());
    EXPECT_FALSE(delegate.has_window());
}

class StaticFocusClient : public client::FocusClient {
public:
    explicit StaticFocusClient(Window* focused)
        : focused_(focused)
    {
    }
    ~StaticFocusClient() override { }

private:
    // client::FocusClient:
    void AddObserver(client::FocusChangeObserver* observer) override { }
    void RemoveObserver(client::FocusChangeObserver* observer) override { }
    void FocusWindow(Window* window) override { }
    void ResetFocusWithinActiveWindow(Window* window) override { }
    Window* GetFocusedWindow() override { return focused_; }

    Window* focused_;

    DISALLOW_COPY_AND_ASSIGN(StaticFocusClient);
};

// Tests that host-cancel-mode event can be dispatched to a dispatcher safely
// when the focused window does not live in the dispatcher's tree.
TEST_F(WindowEventDispatcherTest, HostCancelModeWithFocusedWindowOutside)
{
    test::TestWindowDelegate delegate;
    scoped_ptr<Window> focused(CreateTestWindowWithDelegate(&delegate, 123,
        gfx::Rect(20, 30, 100, 50), NULL));
    StaticFocusClient focus_client(focused.get());
    client::SetFocusClient(root_window(), &focus_client);
    EXPECT_FALSE(root_window()->Contains(focused.get()));
    EXPECT_EQ(focused.get(),
        client::GetFocusClient(root_window())->GetFocusedWindow());
    host()->dispatcher()->DispatchCancelModeEvent();
    EXPECT_EQ(focused.get(),
        client::GetFocusClient(root_window())->GetFocusedWindow());
}

// Dispatches a mouse-move event to |target| when it receives a mouse-move
// event.
class DispatchEventHandler : public ui::EventHandler {
public:
    explicit DispatchEventHandler(Window* target)
        : target_(target)
        , dispatched_(false)
    {
    }
    ~DispatchEventHandler() override { }

    bool dispatched() const { return dispatched_; }

private:
    // ui::EventHandler:
    void OnMouseEvent(ui::MouseEvent* mouse) override
    {
        if (mouse->type() == ui::ET_MOUSE_MOVED) {
            ui::MouseEvent move(ui::ET_MOUSE_MOVED, target_->bounds().CenterPoint(),
                target_->bounds().CenterPoint(),
                ui::EventTimeForNow(), ui::EF_NONE, ui::EF_NONE);
            ui::EventDispatchDetails details = target_->GetHost()->dispatcher()->OnEventFromSource(&move);
            ASSERT_FALSE(details.dispatcher_destroyed);
            EXPECT_FALSE(details.target_destroyed);
            EXPECT_EQ(target_, move.target());
            dispatched_ = true;
        }
        ui::EventHandler::OnMouseEvent(mouse);
    }

    Window* target_;
    bool dispatched_;

    DISALLOW_COPY_AND_ASSIGN(DispatchEventHandler);
};

// Moves |window| to |root_window| when it receives a mouse-move event.
class MoveWindowHandler : public ui::EventHandler {
public:
    MoveWindowHandler(Window* window, Window* root_window)
        : window_to_move_(window)
        , root_window_to_move_to_(root_window)
    {
    }
    ~MoveWindowHandler() override { }

private:
    // ui::EventHandler:
    void OnMouseEvent(ui::MouseEvent* mouse) override
    {
        if (mouse->type() == ui::ET_MOUSE_MOVED) {
            root_window_to_move_to_->AddChild(window_to_move_);
        }
        ui::EventHandler::OnMouseEvent(mouse);
    }

    Window* window_to_move_;
    Window* root_window_to_move_to_;

    DISALLOW_COPY_AND_ASSIGN(MoveWindowHandler);
};

// Tests that nested event dispatch works correctly if the target of the older
// event being dispatched is moved to a different dispatcher in response to an
// event in the inner loop.
TEST_F(WindowEventDispatcherTest, NestedEventDispatchTargetMoved)
{
    scoped_ptr<WindowTreeHost> second_host(
        WindowTreeHost::Create(gfx::Rect(20, 30, 100, 50)));
    second_host->InitHost();
    Window* second_root = second_host->window();

    // Create two windows parented to |root_window()|.
    test::TestWindowDelegate delegate;
    scoped_ptr<Window> first(CreateTestWindowWithDelegate(&delegate, 123,
        gfx::Rect(20, 10, 10, 20), root_window()));
    scoped_ptr<Window> second(CreateTestWindowWithDelegate(&delegate, 234,
        gfx::Rect(40, 10, 50, 20), root_window()));

    // Setup a handler on |first| so that it dispatches an event to |second| when
    // |first| receives an event.
    DispatchEventHandler dispatch_event(second.get());
    first->AddPreTargetHandler(&dispatch_event);

    // Setup a handler on |second| so that it moves |first| into |second_root|
    // when |second| receives an event.
    MoveWindowHandler move_window(first.get(), second_root);
    second->AddPreTargetHandler(&move_window);

    // Some sanity checks: |first| is inside |root_window()|'s tree.
    EXPECT_EQ(root_window(), first->GetRootWindow());
    // The two root windows are different.
    EXPECT_NE(root_window(), second_root);

    // Dispatch an event to |first|.
    ui::MouseEvent move(ui::ET_MOUSE_MOVED, first->bounds().CenterPoint(),
        first->bounds().CenterPoint(), ui::EventTimeForNow(),
        ui::EF_NONE, ui::EF_NONE);
    ui::EventDispatchDetails details = host()->dispatcher()->OnEventFromSource(&move);
    ASSERT_FALSE(details.dispatcher_destroyed);
    EXPECT_TRUE(details.target_destroyed);
    EXPECT_EQ(first.get(), move.target());
    EXPECT_TRUE(dispatch_event.dispatched());
    EXPECT_EQ(second_root, first->GetRootWindow());

    first->RemovePreTargetHandler(&dispatch_event);
    second->RemovePreTargetHandler(&move_window);
}

class AlwaysMouseDownInputStateLookup : public InputStateLookup {
public:
    AlwaysMouseDownInputStateLookup() { }
    ~AlwaysMouseDownInputStateLookup() override { }

private:
    // InputStateLookup:
    bool IsMouseButtonDown() const override { return true; }

    DISALLOW_COPY_AND_ASSIGN(AlwaysMouseDownInputStateLookup);
};

TEST_F(WindowEventDispatcherTest,
    CursorVisibilityChangedWhileCaptureWindowInAnotherDispatcher)
{
    test::EventCountDelegate delegate;
    scoped_ptr<Window> window(CreateTestWindowWithDelegate(&delegate, 123,
        gfx::Rect(20, 10, 10, 20), root_window()));
    window->Show();

    scoped_ptr<WindowTreeHost> second_host(
        WindowTreeHost::Create(gfx::Rect(20, 30, 100, 50)));
    second_host->InitHost();
    WindowEventDispatcher* second_dispatcher = second_host->dispatcher();

    // Install an InputStateLookup on the Env that always claims that a
    // mouse-button is down.
    test::EnvTestHelper(Env::GetInstance()).SetInputStateLookup(scoped_ptr<InputStateLookup>(new AlwaysMouseDownInputStateLookup()));

    window->SetCapture();

    // Because the mouse button is down, setting the capture on |window| will set
    // it as the mouse-move handler for |root_window()|.
    EXPECT_EQ(window.get(), host()->dispatcher()->mouse_moved_handler());

    // This does not set |window| as the mouse-move handler for the second
    // dispatcher.
    EXPECT_EQ(NULL, second_dispatcher->mouse_moved_handler());

    // However, some capture-client updates the capture in each root-window on a
    // capture. Emulate that here. Because of this, the second dispatcher also has
    // |window| as the mouse-move handler.
    client::CaptureDelegate* second_capture_delegate = second_dispatcher;
    second_capture_delegate->UpdateCapture(NULL, window.get());
    EXPECT_EQ(window.get(), second_dispatcher->mouse_moved_handler());

    // Reset the mouse-event counts for |window|.
    delegate.GetMouseMotionCountsAndReset();

    // Notify both hosts that the cursor is now hidden. This should send a single
    // mouse-exit event to |window|.
    host()->OnCursorVisibilityChanged(false);
    second_host->OnCursorVisibilityChanged(false);
    EXPECT_EQ("0 0 1", delegate.GetMouseMotionCountsAndReset());
}

TEST_F(WindowEventDispatcherTest,
    RedirectedEventToDifferentDispatcherLocation)
{
    scoped_ptr<WindowTreeHost> second_host(
        WindowTreeHost::Create(gfx::Rect(20, 30, 100, 50)));
    second_host->InitHost();
    client::SetCaptureClient(second_host->window(),
        client::GetCaptureClient(root_window()));

    test::EventCountDelegate delegate;
    scoped_ptr<Window> window_first(CreateTestWindowWithDelegate(&delegate, 123,
        gfx::Rect(20, 10, 10, 20), root_window()));
    window_first->Show();

    scoped_ptr<Window> window_second(CreateTestWindowWithDelegate(&delegate, 12,
        gfx::Rect(10, 10, 20, 30), second_host->window()));
    window_second->Show();

    window_second->SetCapture();
    EXPECT_EQ(window_second.get(),
        client::GetCaptureWindow(root_window()));

    // Send an event to the first host. Make sure it goes to |window_second| in
    // |second_host| instead (since it has capture).
    EventFilterRecorder recorder_first;
    window_first->AddPreTargetHandler(&recorder_first);
    EventFilterRecorder recorder_second;
    window_second->AddPreTargetHandler(&recorder_second);
    const gfx::Point event_location(25, 15);
    ui::MouseEvent mouse(ui::ET_MOUSE_PRESSED, event_location, event_location,
        ui::EventTimeForNow(), ui::EF_LEFT_MOUSE_BUTTON,
        ui::EF_LEFT_MOUSE_BUTTON);
    DispatchEventUsingWindowDispatcher(&mouse);
    EXPECT_TRUE(recorder_first.events().empty());
    ASSERT_EQ(1u, recorder_second.events().size());
    EXPECT_EQ(ui::ET_MOUSE_PRESSED, recorder_second.events()[0]);
    EXPECT_EQ(event_location.ToString(),
        recorder_second.mouse_locations()[0].ToString());
}

class AsyncWindowDelegate : public test::TestWindowDelegate {
public:
    AsyncWindowDelegate(WindowEventDispatcher* dispatcher)
        : dispatcher_(dispatcher)
        , window_(nullptr)
    {
    }

    void set_window(Window* window)
    {
        window_ = window;
    }

private:
    void OnTouchEvent(ui::TouchEvent* event) override
    {
        // Convert touch event back to root window coordinates.
        event->ConvertLocationToTarget(window_, window_->GetRootWindow());
        event->DisableSynchronousHandling();
        dispatcher_->ProcessedTouchEvent(event->unique_event_id(), window_,
            ui::ER_UNHANDLED);
        event->StopPropagation();
    }

    WindowEventDispatcher* dispatcher_;
    Window* window_;

    DISALLOW_COPY_AND_ASSIGN(AsyncWindowDelegate);
};

// Tests that gesture events dispatched through the asynchronous flow have
// co-ordinates in the right co-ordinate space.
TEST_F(WindowEventDispatcherTest, GestureEventCoordinates)
{
    const float kX = 67.3f;
    const float kY = 97.8f;

    const int kWindowOffset = 50;
    EventFilterRecorder recorder;
    root_window()->AddPreTargetHandler(&recorder);
    AsyncWindowDelegate delegate(host()->dispatcher());
    HoldPointerOnScrollHandler handler(host()->dispatcher(), &recorder);
    scoped_ptr<aura::Window> window(CreateTestWindowWithDelegate(
        &delegate,
        1,
        gfx::Rect(kWindowOffset, kWindowOffset, 100, 100),
        root_window()));
    window->AddPreTargetHandler(&handler);

    delegate.set_window(window.get());

    ui::TouchEvent touch_pressed_event(ui::ET_TOUCH_PRESSED, gfx::Point(), 0,
        ui::EventTimeForNow());
    touch_pressed_event.set_location_f(gfx::PointF(kX, kY));
    touch_pressed_event.set_root_location_f(gfx::PointF(kX, kY));

    DispatchEventUsingWindowDispatcher(&touch_pressed_event);

    ASSERT_EQ(1u, recorder.touch_locations().size());
    EXPECT_EQ(gfx::Point(kX - kWindowOffset, kY - kWindowOffset).ToString(),
        recorder.touch_locations()[0].ToString());

    ASSERT_EQ(2u, recorder.gesture_locations().size());
    EXPECT_EQ(gfx::Point(kX - kWindowOffset, kY - kWindowOffset).ToString(),
        recorder.gesture_locations()[0].ToString());
    root_window()->RemovePreTargetHandler(&recorder);
}

// Tests that a scroll-generating touch-event is marked as such.
TEST_F(WindowEventDispatcherTest, TouchMovesMarkedWhenCausingScroll)
{
    EventFilterRecorder recorder;
    root_window()->AddPreTargetHandler(&recorder);

    const gfx::Point location(20, 20);
    ui::TouchEvent press(
        ui::ET_TOUCH_PRESSED, location, 0, ui::EventTimeForNow());
    DispatchEventUsingWindowDispatcher(&press);
    EXPECT_FALSE(recorder.LastTouchMayCauseScrolling());
    EXPECT_TRUE(recorder.HasReceivedEvent(ui::ET_TOUCH_PRESSED));
    recorder.Reset();

    ui::TouchEvent move(ui::ET_TOUCH_MOVED,
        location + gfx::Vector2d(100, 100),
        0,
        ui::EventTimeForNow());
    DispatchEventUsingWindowDispatcher(&move);
    EXPECT_TRUE(recorder.LastTouchMayCauseScrolling());
    EXPECT_TRUE(recorder.HasReceivedEvent(ui::ET_TOUCH_MOVED));
    EXPECT_TRUE(recorder.HasReceivedEvent(ui::ET_GESTURE_SCROLL_BEGIN));
    EXPECT_TRUE(recorder.HasReceivedEvent(ui::ET_GESTURE_SCROLL_UPDATE));
    recorder.Reset();

    ui::TouchEvent move2(ui::ET_TOUCH_MOVED,
        location + gfx::Vector2d(200, 200),
        0,
        ui::EventTimeForNow());
    DispatchEventUsingWindowDispatcher(&move2);
    EXPECT_TRUE(recorder.LastTouchMayCauseScrolling());
    EXPECT_TRUE(recorder.HasReceivedEvent(ui::ET_TOUCH_MOVED));
    EXPECT_TRUE(recorder.HasReceivedEvent(ui::ET_GESTURE_SCROLL_UPDATE));
    recorder.Reset();

    // Delay the release to avoid fling generation.
    ui::TouchEvent release(
        ui::ET_TOUCH_RELEASED, location + gfx::Vector2d(200, 200), 0,
        ui::EventTimeForNow() + base::TimeDelta::FromSeconds(1));
    DispatchEventUsingWindowDispatcher(&release);
    EXPECT_TRUE(recorder.LastTouchMayCauseScrolling());
    EXPECT_TRUE(recorder.HasReceivedEvent(ui::ET_TOUCH_RELEASED));
    EXPECT_TRUE(recorder.HasReceivedEvent(ui::ET_GESTURE_SCROLL_END));

    root_window()->RemovePreTargetHandler(&recorder);
}

// OnCursorMovedToRootLocation() is sometimes called instead of
// WindowTreeHost::MoveCursorTo() when the cursor did not move but the
// cursor's position in root coordinates has changed (e.g. when the displays's
// scale factor changed). Test that hover effects are properly updated.
TEST_F(WindowEventDispatcherTest, OnCursorMovedToRootLocationUpdatesHover)
{
    WindowEventDispatcher* dispatcher = host()->dispatcher();

    scoped_ptr<Window> w(CreateNormalWindow(1, root_window(), nullptr));
    w->SetBounds(gfx::Rect(20, 20, 20, 20));
    w->Show();

    // Move the cursor off of |w|.
    dispatcher->OnCursorMovedToRootLocation(gfx::Point(100, 100));

    EventFilterRecorder recorder;
    w->AddPreTargetHandler(&recorder);
    dispatcher->OnCursorMovedToRootLocation(gfx::Point(22, 22));
    RunAllPendingInMessageLoop();
    EXPECT_TRUE(recorder.HasReceivedEvent(ui::ET_MOUSE_ENTERED));
    recorder.Reset();

    // The cursor should not be over |w| after changing the device scale factor to
    // 2x. A ET_MOUSE_EXITED event should have been sent to |w|.
    test_screen()->SetDeviceScaleFactor(2.f);
    dispatcher->OnCursorMovedToRootLocation(gfx::Point(11, 11));
    RunAllPendingInMessageLoop();
    EXPECT_TRUE(recorder.HasReceivedEvent(ui::ET_MOUSE_EXITED));

    w->RemovePreTargetHandler(&recorder);
}

} // namespace aura
